Search
Find a vulnerability
Search criteria
90 vulnerabilities by h2o
CVE-2026-54340 (GCVE-0-2026-54340)
Vulnerability from nvd – Published: 2026-07-16 23:29 – Updated: 2026-07-17 18:06
VLAI
EPSS
VEX
Title
h2o has HTTP/2 state amplification
Summary
h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 9265bdd, there is an HTTP/2 state amplification issue that combines HPACK decompression amplification with Slowloris-style stream stalling. Amplified decoded header state can be retained by stalled HTTP/2 streams, and depending on the configuration, additional limits are needed to bound decoded header state and prevent attack. This issue has been fixed by commit 9265bdd.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/h2o/h2o/security/advisories/GH… | x_refsource_CONFIRM |
| https://github.com/h2o/h2o/commit/9265bdd9a996ed9… | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-54340",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-17T15:26:10.914862Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-17T18:06:19.274Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "h2o",
"vendor": "h2o",
"versions": [
{
"status": "affected",
"version": "\u003c 9265bdd"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 9265bdd, there is an HTTP/2 state amplification issue that combines HPACK decompression amplification with Slowloris-style stream stalling. Amplified decoded header state can be retained by stalled HTTP/2 streams, and depending on the configuration, additional limits are needed to bound decoded header state and prevent attack. This issue has been fixed by commit 9265bdd."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400: Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-770",
"description": "CWE-770: Allocation of Resources Without Limits or Throttling",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-16T23:29:50.799Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/h2o/h2o/security/advisories/GHSA-qcrr-wrhc-pgq9",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/h2o/h2o/security/advisories/GHSA-qcrr-wrhc-pgq9"
},
{
"name": "https://github.com/h2o/h2o/commit/9265bdd9a996ed992681055e3996baf3e09d2063",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/h2o/h2o/commit/9265bdd9a996ed992681055e3996baf3e09d2063"
}
],
"source": {
"advisory": "GHSA-qcrr-wrhc-pgq9",
"discovery": "UNKNOWN"
},
"title": "h2o has HTTP/2 state amplification"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-54340",
"datePublished": "2026-07-16T23:29:50.799Z",
"dateReserved": "2026-06-12T19:23:22.316Z",
"dateUpdated": "2026-07-17T18:06:19.274Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-44453 (GCVE-0-2026-44453)
Vulnerability from nvd – Published: 2026-07-16 23:04 – Updated: 2026-07-17 14:29
VLAI
EPSS
VEX
Title
h2o is vulnerable to musl libc stack overflow
Summary
h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 6b5370d, h2o is vulnerable to a Denial of Service attack when calling alloca under certain conditions. When serving static files, h2o builds the file path on stack, by calling alloca. The maximum size of the memory allocated using alloca can be as huge as ~600KB, which exceeds the default pthread stack size used by musl libc (128KB). If the amount of memory allocated by alloca exceeds the stack size, the h2o server crashes with a segmentation fault, while it tries to touch the guard page. This issue has been fixed by commit 6b5370d.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/h2o/h2o/security/advisories/GH… | x_refsource_CONFIRM |
| https://github.com/h2o/h2o/commit/6b5370d9d09fcf8… | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-44453",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-17T14:29:07.563010Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-17T14:29:15.447Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "h2o",
"vendor": "h2o",
"versions": [
{
"status": "affected",
"version": "\u003c 6b5370d"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 6b5370d, h2o is vulnerable to a Denial of Service attack when calling alloca under certain conditions. When serving static files, h2o builds the file path on stack, by calling alloca. The maximum size of the memory allocated using alloca can be as huge as ~600KB, which exceeds the default pthread stack size used by musl libc (128KB). If the amount of memory allocated by alloca exceeds the stack size, the h2o server crashes with a segmentation fault, while it tries to touch the guard page. This issue has been fixed by commit 6b5370d."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-789",
"description": "CWE-789: Memory Allocation with Excessive Size Value",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-770",
"description": "CWE-770: Allocation of Resources Without Limits or Throttling",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-16T23:04:41.756Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/h2o/h2o/security/advisories/GHSA-rf9v-m59p-mq84",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/h2o/h2o/security/advisories/GHSA-rf9v-m59p-mq84"
},
{
"name": "https://github.com/h2o/h2o/commit/6b5370d9d09fcf83aa7620ddf77de1954a192181",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/h2o/h2o/commit/6b5370d9d09fcf83aa7620ddf77de1954a192181"
}
],
"source": {
"advisory": "GHSA-rf9v-m59p-mq84",
"discovery": "UNKNOWN"
},
"title": "h2o is vulnerable to musl libc stack overflow"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-44453",
"datePublished": "2026-07-16T23:04:41.756Z",
"dateReserved": "2026-05-06T15:49:25.192Z",
"dateUpdated": "2026-07-17T14:29:15.447Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-44452 (GCVE-0-2026-44452)
Vulnerability from nvd – Published: 2026-07-16 22:54 – Updated: 2026-07-17 14:03
VLAI
EPSS
VEX
Title
h2o is vulnerable to heap overrun
Summary
h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 8dc37cb, when h2o receives a ClientHello message over TLS or QUIC and it contains a zero-length SNI extension, the h2o server runs over the zero-length hostname while trying to copy the hostname, assuming that it is NULL-terminated. This is a potential denial-of-service attack vector in sense that it might trigger segmentation violation. This issue has been fixed by commit 8dc37cb.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/h2o/h2o/security/advisories/GH… | x_refsource_CONFIRM |
| https://github.com/h2o/h2o/commit/8dc37cb1e6171f7… | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-44452",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-17T14:03:32.725590Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-17T14:03:52.757Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "h2o",
"vendor": "h2o",
"versions": [
{
"status": "affected",
"version": "\u003c 8dc37cb"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 8dc37cb, when h2o receives a ClientHello message over TLS or QUIC and it contains a zero-length SNI extension, the h2o server runs over the zero-length hostname while trying to copy the hostname, assuming that it is NULL-terminated. This is a potential denial-of-service attack vector in sense that it might trigger segmentation violation. This issue has been fixed by commit 8dc37cb."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-125",
"description": "CWE-125: Out-of-bounds Read",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-170",
"description": "CWE-170: Improper Null Termination",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-16T22:54:42.914Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/h2o/h2o/security/advisories/GHSA-w68q-rqwx-7wvq",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/h2o/h2o/security/advisories/GHSA-w68q-rqwx-7wvq"
},
{
"name": "https://github.com/h2o/h2o/commit/8dc37cb1e6171f7f772667618ea440696fed82c3",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/h2o/h2o/commit/8dc37cb1e6171f7f772667618ea440696fed82c3"
}
],
"source": {
"advisory": "GHSA-w68q-rqwx-7wvq",
"discovery": "UNKNOWN"
},
"title": "h2o is vulnerable to heap overrun"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-44452",
"datePublished": "2026-07-16T22:54:42.914Z",
"dateReserved": "2026-05-06T15:49:25.192Z",
"dateUpdated": "2026-07-17T14:03:52.757Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-44436 (GCVE-0-2026-44436)
Vulnerability from nvd – Published: 2026-07-16 22:44 – Updated: 2026-07-17 10:48
VLAI
EPSS
VEX
Title
Quicly is vulnerable to connection state corruption
Summary
Quicly is an IETF QUIC protocol implementation intended primarily for use within the H2O HTTP server. Prior to commit 8b178e6, Quicly is vulnerable to a Denial of Service attack through connection state corruption. In QUIC Invariants, the maximum length of a Connection ID is 255 bytes, while QUIC version 1 further restricts the maximum to 20 bytes. Quicly implements QUIC version 1 and therefore its CID buffers are limited to 20 bytes. However, to be able to respond to unknown versions of QUIC, its packet decoder accepts Connection IDs of up to 255 bytes. As its CID buffers are merely 20 bytes long, Quicly must reject QUIC version 1 packets with Connection IDs longer than that. The command line tool bundled with Quicly has had that check, however the library itself lacked such enforcement. As a consequence, when used by applications that lack their own enforcement, the connection state becoming inconsistent to buffer overrun. Fortunately, the overflow stops within the allocated chunk of memory, but nevertheless, the bug leads to assertion failures. This issue has been fixed by commit 8b178e6.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/h2o/quicly/security/advisories… | x_refsource_CONFIRM |
| https://github.com/h2o/quicly/commit/8b178e692c51… | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-44436",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-17T10:48:23.373806Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-17T10:48:33.974Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "quicly",
"vendor": "h2o",
"versions": [
{
"status": "affected",
"version": "\u003c 8b178e6"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Quicly is an IETF QUIC protocol implementation intended primarily for use within the H2O HTTP server. Prior to commit 8b178e6, Quicly is vulnerable to a Denial of Service attack through connection state corruption. In QUIC Invariants, the maximum length of a Connection ID is 255 bytes, while QUIC version 1 further restricts the maximum to 20 bytes. Quicly implements QUIC version 1 and therefore its CID buffers are limited to 20 bytes. However, to be able to respond to unknown versions of QUIC, its packet decoder accepts Connection IDs of up to 255 bytes. As its CID buffers are merely 20 bytes long, Quicly must reject QUIC version 1 packets with Connection IDs longer than that. The command line tool bundled with Quicly has had that check, however the library itself lacked such enforcement. As a consequence, when used by applications that lack their own enforcement, the connection state becoming inconsistent to buffer overrun. Fortunately, the overflow stops within the allocated chunk of memory, but nevertheless, the bug leads to assertion failures. This issue has been fixed by commit 8b178e6."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-120",
"description": "CWE-120: Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-787",
"description": "CWE-787: Out-of-bounds Write",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-16T22:44:34.254Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/h2o/quicly/security/advisories/GHSA-v55w-59qx-2v78",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/h2o/quicly/security/advisories/GHSA-v55w-59qx-2v78"
},
{
"name": "https://github.com/h2o/quicly/commit/8b178e692c51a3b1031612ef89f03a53aac63c15",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/h2o/quicly/commit/8b178e692c51a3b1031612ef89f03a53aac63c15"
}
],
"source": {
"advisory": "GHSA-v55w-59qx-2v78",
"discovery": "UNKNOWN"
},
"title": "Quicly is vulnerable to connection state corruption"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-44436",
"datePublished": "2026-07-16T22:44:34.254Z",
"dateReserved": "2026-05-06T14:40:00.954Z",
"dateUpdated": "2026-07-17T10:48:33.974Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-44435 (GCVE-0-2026-44435)
Vulnerability from nvd – Published: 2026-07-16 22:39 – Updated: 2026-07-17 13:02
VLAI
EPSS
VEX
Title
Quicly: Remote Denial of Service via assertion failure when CRYPTO stream handshake data exceeds 32KB
Summary
Quicly is an IETF QUIC protocol implementation intended primarily for use within the H2O HTTP server. Prior to commit 937d0e9, an assertion failure is raised when the total number of valid handshake messages received over a CRYPTO stream of a single packet number space exceeds 32KB, causing a Denial of Service. This issue has been fixed by commit 937d0e9.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/h2o/quicly/security/advisories… | x_refsource_CONFIRM |
| https://github.com/h2o/quicly/commit/937d0e9e7c66… | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-44435",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-17T13:02:47.698484Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-17T13:02:55.330Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "quicly",
"vendor": "h2o",
"versions": [
{
"status": "affected",
"version": "\u003c 937d0e9"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Quicly is an IETF QUIC protocol implementation intended primarily for use within the H2O HTTP server. Prior to commit 937d0e9, an assertion failure is raised when the total number of valid handshake messages received over a CRYPTO stream of a single packet number space exceeds 32KB, causing a Denial of Service. This issue has been fixed by commit 937d0e9."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-617",
"description": "CWE-617: Reachable Assertion",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400: Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-16T22:39:50.873Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/h2o/quicly/security/advisories/GHSA-2cw9-5673-73gv",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/h2o/quicly/security/advisories/GHSA-2cw9-5673-73gv"
},
{
"name": "https://github.com/h2o/quicly/commit/937d0e9e7c669fc2bee4920632ab6aaac60e4d81",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/h2o/quicly/commit/937d0e9e7c669fc2bee4920632ab6aaac60e4d81"
}
],
"source": {
"advisory": "GHSA-2cw9-5673-73gv",
"discovery": "UNKNOWN"
},
"title": "Quicly: Remote Denial of Service via assertion failure when CRYPTO stream handshake data exceeds 32KB"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-44435",
"datePublished": "2026-07-16T22:39:50.873Z",
"dateReserved": "2026-05-06T14:40:00.954Z",
"dateUpdated": "2026-07-17T13:02:55.330Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-44434 (GCVE-0-2026-44434)
Vulnerability from nvd – Published: 2026-07-16 22:34 – Updated: 2026-07-18 03:21
VLAI
EPSS
VEX
Title
Quicly is vulnerable to stateless reset injection
Summary
Quicly is an IETF QUIC protocol implementation intended primarily for use within the H2O HTTP server. Prior to commit dccf5d4, Quicly was vulnerable to stateless reset injection through lack of packet entry validation. The QUIC protocol is designed to withstand packet injection attacks, once the handshake is complete. Only packets that carry some secret patterns are considered as stateless resets. Quicly allows the peer to share up to 4 such patterns per connection. However, until now, it failed to determine which of the 4 slots that it uses to retain the secret patterns contains a valid entry. As the slots are zero-initialized, the failure meant that, unless the peer advertised 4 of such patterns, an all-zero pattern was treated as a stateless reset.In effect, this allowed an on-path attacker to reset QUIC connections governed by Quicly. This issue has been fixed by commit dccf5d4.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/h2o/quicly/security/advisories… | x_refsource_CONFIRM |
| https://github.com/h2o/quicly/commit/dccf5d4579c7… | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-44434",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-18T03:21:11.398981Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-18T03:21:24.526Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "quicly",
"vendor": "h2o",
"versions": [
{
"status": "affected",
"version": "\u003c dccf5d4"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Quicly is an IETF QUIC protocol implementation intended primarily for use within the H2O HTTP server. Prior to commit dccf5d4, Quicly was vulnerable to stateless reset injection through lack of packet entry validation. The QUIC protocol is designed to withstand packet injection attacks, once the handshake is complete. Only packets that carry some secret patterns are considered as stateless resets. Quicly allows the peer to share up to 4 such patterns per connection. However, until now, it failed to determine which of the 4 slots that it uses to retain the secret patterns contains a valid entry. As the slots are zero-initialized, the failure meant that, unless the peer advertised 4 of such patterns, an all-zero pattern was treated as a stateless reset.In effect, this allowed an on-path attacker to reset QUIC connections governed by Quicly. This issue has been fixed by commit dccf5d4."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-345",
"description": "CWE-345: Insufficient Verification of Data Authenticity",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-665",
"description": "CWE-665: Improper Initialization",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-16T22:34:09.386Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/h2o/quicly/security/advisories/GHSA-899f-49jq-pfh8",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/h2o/quicly/security/advisories/GHSA-899f-49jq-pfh8"
},
{
"name": "https://github.com/h2o/quicly/commit/dccf5d4579c7ae9dd6e8f90c36d52e311bb60710",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/h2o/quicly/commit/dccf5d4579c7ae9dd6e8f90c36d52e311bb60710"
}
],
"source": {
"advisory": "GHSA-899f-49jq-pfh8",
"discovery": "UNKNOWN"
},
"title": "Quicly is vulnerable to stateless reset injection"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-44434",
"datePublished": "2026-07-16T22:34:09.386Z",
"dateReserved": "2026-05-06T14:40:00.954Z",
"dateUpdated": "2026-07-18T03:21:24.526Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-44433 (GCVE-0-2026-44433)
Vulnerability from nvd – Published: 2026-07-16 22:23 – Updated: 2026-07-17 18:06
VLAI
EPSS
VEX
Title
Quicly is vulnerable to memory exhaustion
Summary
Quicly is an IETF QUIC protocol implementation intended primarily for use within the H2O HTTP server. Prior to commit 8b178e6, an adversarial peer could send a STREAM frame carrying just one byte at the largest offset being permitted to obtain additional flow control credit, which under certain circumstances could lead to a Denial of Service. Assuming the application prepares a receive buffer for storing all data that arrive out-of-order, up to the largest offset being received, this behavior could lead to the application allocating large amount of memory with the peer sending only a handful of packets, resulting in memory exhaustion. In addition to the receive buffer allocation strategy, the severity of this vulnerability depends on how the application controls the stream concurrency. In case of the H2O HTTP server, under its default setting, this bug increases the maximum amount of memory allocated per connection by about 4 times. This issue has been fixed by commit 8b178e6.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/h2o/quicly/security/advisories… | x_refsource_CONFIRM |
| https://github.com/h2o/quicly/commit/8b178e692c51… | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-44433",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-17T15:26:30.321361Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-17T18:06:23.088Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "quicly",
"vendor": "h2o",
"versions": [
{
"status": "affected",
"version": "\u003c 8b178e6"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Quicly is an IETF QUIC protocol implementation intended primarily for use within the H2O HTTP server. Prior to commit 8b178e6, an adversarial peer could send a STREAM frame carrying just one byte at the largest offset being permitted to obtain additional flow control credit, which under certain circumstances could lead to a Denial of Service. Assuming the application prepares a receive buffer for storing all data that arrive out-of-order, up to the largest offset being received, this behavior could lead to the application allocating large amount of memory with the peer sending only a handful of packets, resulting in memory exhaustion. In addition to the receive buffer allocation strategy, the severity of this vulnerability depends on how the application controls the stream concurrency. In case of the H2O HTTP server, under its default setting, this bug increases the maximum amount of memory allocated per connection by about 4 times. This issue has been fixed by commit 8b178e6."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-770",
"description": "CWE-770: Allocation of Resources Without Limits or Throttling",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400: Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-16T22:23:17.247Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/h2o/quicly/security/advisories/GHSA-f7qr-4p37-9gx9",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/h2o/quicly/security/advisories/GHSA-f7qr-4p37-9gx9"
},
{
"name": "https://github.com/h2o/quicly/commit/8b178e692c51a3b1031612ef89f03a53aac63c15",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/h2o/quicly/commit/8b178e692c51a3b1031612ef89f03a53aac63c15"
}
],
"source": {
"advisory": "GHSA-f7qr-4p37-9gx9",
"discovery": "UNKNOWN"
},
"title": "Quicly is vulnerable to memory exhaustion"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-44433",
"datePublished": "2026-07-16T22:23:17.247Z",
"dateReserved": "2026-05-06T14:40:00.954Z",
"dateUpdated": "2026-07-17T18:06:23.088Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-55213 (GCVE-0-2026-55213)
Vulnerability from nvd – Published: 2026-07-10 20:49 – Updated: 2026-07-13 14:14
VLAI
EPSS
VEX
Title
h2o: musl libc stack overflow (QPACK)
Summary
h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit edd7a120bfc4af11ac0cbebce2a43cc1f93f9af1, when h2o processes a QPACK instruction sent from the peer over HTTP/3, lib/http3/qpack.c might allocate an on-stack buffer as large as approximately 800 KB by calling alloca, which exceeds the default pthread stack size used by musl libc and causes the h2o server to crash with a segmentation fault while touching the guard page. This issue is fixed in commit edd7a120bfc4af11ac0cbebce2a43cc1f93f9af1.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/h2o/h2o/security/advisories/GH… | x_refsource_CONFIRM |
| https://github.com/h2o/h2o/commit/edd7a120bfc4af1… | x_refsource_MISC |
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-55213",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-13T14:14:29.008624Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-13T14:14:45.685Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "h2o",
"vendor": "h2o",
"versions": [
{
"status": "affected",
"version": "\u003c edd7a120bfc4af11ac0cbebce2a43cc1f93f9af1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit edd7a120bfc4af11ac0cbebce2a43cc1f93f9af1, when h2o processes a QPACK instruction sent from the peer over HTTP/3, lib/http3/qpack.c might allocate an on-stack buffer as large as approximately 800 KB by calling alloca, which exceeds the default pthread stack size used by musl libc and causes the h2o server to crash with a segmentation fault while touching the guard page. This issue is fixed in commit edd7a120bfc4af11ac0cbebce2a43cc1f93f9af1."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-789",
"description": "CWE-789: Memory Allocation with Excessive Size Value",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-10T20:49:58.764Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/h2o/h2o/security/advisories/GHSA-432c-8xmj-frmq",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/h2o/h2o/security/advisories/GHSA-432c-8xmj-frmq"
},
{
"name": "https://github.com/h2o/h2o/commit/edd7a120bfc4af11ac0cbebce2a43cc1f93f9af1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/h2o/h2o/commit/edd7a120bfc4af11ac0cbebce2a43cc1f93f9af1"
}
],
"source": {
"advisory": "GHSA-432c-8xmj-frmq",
"discovery": "UNKNOWN"
},
"title": "h2o: musl libc stack overflow (QPACK)"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-55213",
"datePublished": "2026-07-10T20:49:58.764Z",
"dateReserved": "2026-06-16T16:16:32.627Z",
"dateUpdated": "2026-07-13T14:14:45.685Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-8752 (GCVE-0-2026-8752)
Vulnerability from nvd – Published: 2026-05-17 11:45 – Updated: 2026-05-18 14:39
VLAI
EPSS
VEX
Title
h2oai h2o-3 Rapids setproperty Primitive AstSetProperty.java exec access control
Summary
A weakness has been identified in h2oai h2o-3 up to 7402. This vulnerability affects the function exec of the file h2o-core/src/main/java/water/rapids/ast/prims/misc/AstSetProperty.java of the component Rapids setproperty Primitive Handler. Executing a manipulation can lead to improper access controls. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/364379 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/364379/cti | signaturepermissions-required |
| https://vuldb.com/submit/810108 | third-party-advisory |
| https://vulnplus-note.wetolink.com/share/pyVa0GWPuAZE | exploit |
Impacted products
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-8752",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-18T14:38:58.874014Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-05-18T14:39:10.246Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:h2oai:h2o-3:*:*:*:*:*:*:*:*"
],
"modules": [
"Rapids setproperty Primitive Handler"
],
"product": "h2o-3",
"vendor": "h2oai",
"versions": [
{
"status": "affected",
"version": "7402"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "vulnplusbot (VulDB User)"
},
{
"lang": "en",
"type": "coordinator",
"value": "VulDB CNA Team"
}
],
"descriptions": [
{
"lang": "en",
"value": "A weakness has been identified in h2oai h2o-3 up to 7402. This vulnerability affects the function exec of the file h2o-core/src/main/java/water/rapids/ast/prims/misc/AstSetProperty.java of the component Rapids setproperty Primitive Handler. Executing a manipulation can lead to improper access controls. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 6.9,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 5,
"vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N/E:POC/RL:ND/RC:UR",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-284",
"description": "Improper Access Controls",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-266",
"description": "Incorrect Privilege Assignment",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-17T11:45:11.583Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-364379 | h2oai h2o-3 Rapids setproperty Primitive AstSetProperty.java exec access control",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/vuln/364379"
},
{
"name": "VDB-364379 | CTI Indicators (IOB, IOC, TTP, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/vuln/364379/cti"
},
{
"name": "Submit #810108 | H2O-3 latest pre-auth logic flaw",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/submit/810108"
},
{
"tags": [
"exploit"
],
"url": "https://vulnplus-note.wetolink.com/share/pyVa0GWPuAZE"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-05-16T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2026-05-16T02:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2026-05-16T18:25:57.000Z",
"value": "VulDB entry last update"
}
],
"title": "h2oai h2o-3 Rapids setproperty Primitive AstSetProperty.java exec access control"
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2026-8752",
"datePublished": "2026-05-17T11:45:11.583Z",
"dateReserved": "2026-05-16T16:20:47.483Z",
"dateUpdated": "2026-05-18T14:39:10.246Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-8751 (GCVE-0-2026-8751)
Vulnerability from nvd – Published: 2026-05-17 11:30 – Updated: 2026-05-18 14:19
VLAI
EPSS
VEX
Title
h2oai h2o-3 JAR Model.java importBinaryModel deserialization
Summary
A security flaw has been discovered in h2oai h2o-3 up to 7402. This affects the function importBinaryModel of the file h2o-core/src/main/java/hex/Model.java of the component JAR Handler. Performing a manipulation results in deserialization. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/364378 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/364378/cti | signaturepermissions-required |
| https://vuldb.com/submit/810107 | third-party-advisory |
| https://vulnplus-note.wetolink.com/share/b5nsQg6EcsBS | exploit |
Impacted products
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-8751",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-18T14:19:11.478608Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-05-18T14:19:22.677Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:h2oai:h2o-3:*:*:*:*:*:*:*:*"
],
"modules": [
"JAR Handler"
],
"product": "h2o-3",
"vendor": "h2oai",
"versions": [
{
"status": "affected",
"version": "7402"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "vulnplusbot (VulDB User)"
},
{
"lang": "en",
"type": "coordinator",
"value": "VulDB CNA Team"
}
],
"descriptions": [
{
"lang": "en",
"value": "A security flaw has been discovered in h2oai h2o-3 up to 7402. This affects the function importBinaryModel of the file h2o-core/src/main/java/hex/Model.java of the component JAR Handler. Performing a manipulation results in deserialization. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 6.9,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 7.3,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 7.3,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 7.5,
"vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-502",
"description": "Deserialization",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-20",
"description": "Improper Input Validation",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-17T11:30:10.692Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-364378 | h2oai h2o-3 JAR Model.java importBinaryModel deserialization",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/vuln/364378"
},
{
"name": "VDB-364378 | CTI Indicators (IOB, IOC, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/vuln/364378/cti"
},
{
"name": "Submit #810107 | H2O-3 latest Pre-Auth Insecure Deserialization",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/submit/810107"
},
{
"tags": [
"exploit"
],
"url": "https://vulnplus-note.wetolink.com/share/b5nsQg6EcsBS"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-05-16T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2026-05-16T02:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2026-05-16T18:25:55.000Z",
"value": "VulDB entry last update"
}
],
"title": "h2oai h2o-3 JAR Model.java importBinaryModel deserialization"
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2026-8751",
"datePublished": "2026-05-17T11:30:10.692Z",
"dateReserved": "2026-05-16T16:20:44.883Z",
"dateUpdated": "2026-05-18T14:19:22.677Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-8750 (GCVE-0-2026-8750)
Vulnerability from nvd – Published: 2026-05-17 10:45 – Updated: 2026-05-18 17:53
VLAI
EPSS
VEX
Title
h2oai h2o-3 ImportFile API PersistNFS.java importFiles information disclosure
Summary
A vulnerability was identified in h2oai h2o-3 up to 7402. Affected by this issue is the function importFiles of the file h2o-core/src/main/java/water/persist/PersistNFS.java of the component ImportFile API. Such manipulation leads to information disclosure. The attack can be executed remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/364377 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/364377/cti | signaturepermissions-required |
| https://vuldb.com/submit/810105 | third-party-advisory |
| https://vulnplus-note.wetolink.com/share/wWjmsfKHRJi3 | exploit |
Impacted products
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-8750",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-18T17:11:10.715335Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-05-18T17:53:03.393Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:h2oai:h2o-3:*:*:*:*:*:*:*:*"
],
"modules": [
"ImportFile API"
],
"product": "h2o-3",
"vendor": "h2oai",
"versions": [
{
"status": "affected",
"version": "7402"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "vulnplusbot (VulDB User)"
},
{
"lang": "en",
"type": "coordinator",
"value": "VulDB CNA Team"
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability was identified in h2oai h2o-3 up to 7402. Affected by this issue is the function importFiles of the file h2o-core/src/main/java/water/persist/PersistNFS.java of the component ImportFile API. Such manipulation leads to information disclosure. The attack can be executed remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 6.9,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 5,
"vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N/E:POC/RL:ND/RC:UR",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-200",
"description": "Information Disclosure",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-284",
"description": "Improper Access Controls",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-17T10:45:10.231Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-364377 | h2oai h2o-3 ImportFile API PersistNFS.java importFiles information disclosure",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/vuln/364377"
},
{
"name": "VDB-364377 | CTI Indicators (IOB, IOC, TTP, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/vuln/364377/cti"
},
{
"name": "Submit #810105 | H2O-3 latest arbitrary local file disclosure",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/submit/810105"
},
{
"tags": [
"exploit"
],
"url": "https://vulnplus-note.wetolink.com/share/wWjmsfKHRJi3"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-05-16T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2026-05-16T02:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2026-05-16T18:25:52.000Z",
"value": "VulDB entry last update"
}
],
"title": "h2oai h2o-3 ImportFile API PersistNFS.java importFiles information disclosure"
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2026-8750",
"datePublished": "2026-05-17T10:45:10.231Z",
"dateReserved": "2026-05-16T16:20:42.111Z",
"dateUpdated": "2026-05-18T17:53:03.393Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-3960 (GCVE-0-2026-3960)
Vulnerability from nvd – Published: 2026-04-23 08:47 – Updated: 2026-04-23 12:29
VLAI
EPSS
VEX
Title
Remote Code Execution in h2oai/h2o-3
Summary
A critical remote code execution vulnerability exists in the unauthenticated REST API endpoint /99/ImportSQLTable in H2O-3 version 3.46.0.9 and prior. The vulnerability arises due to insufficient security controls in the parameter blacklist mechanism, which only targets MySQL JDBC driver-specific dangerous parameters. An attacker can bypass these controls by switching the JDBC URL protocol to jdbc:postgresql: and exploiting PostgreSQL JDBC driver-specific parameters such as socketFactory and socketFactoryArg. This allows unauthenticated attackers to execute arbitrary code on the H2O-3 server with the privileges of the H2O-3 process. The issue is resolved in version 3.46.0.10.
Severity
5.9 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-94 - Improper Control of Generation of Code
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| h2oai | h2oai/h2o-3 |
Affected:
unspecified , < 3.46.0.10
(custom)
|
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-3960",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-23T12:25:29.022861Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-04-23T12:29:32.439Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "h2oai/h2o-3",
"vendor": "h2oai",
"versions": [
{
"lessThan": "3.46.0.10",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A critical remote code execution vulnerability exists in the unauthenticated REST API endpoint /99/ImportSQLTable in H2O-3 version 3.46.0.9 and prior. The vulnerability arises due to insufficient security controls in the parameter blacklist mechanism, which only targets MySQL JDBC driver-specific dangerous parameters. An attacker can bypass these controls by switching the JDBC URL protocol to jdbc:postgresql: and exploiting PostgreSQL JDBC driver-specific parameters such as socketFactory and socketFactoryArg. This allows unauthenticated attackers to execute arbitrary code on the H2O-3 server with the privileges of the H2O-3 process. The issue is resolved in version 3.46.0.10."
}
],
"metrics": [
{
"cvssV3_0": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-94",
"description": "CWE-94 Improper Control of Generation of Code",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-04-23T08:47:48.618Z",
"orgId": "c09c270a-b464-47c1-9133-acb35b22c19a",
"shortName": "@huntr_ai"
},
"references": [
{
"url": "https://huntr.com/bounties/6954fe04-b905-453f-8c53-205ac8377e0d"
},
{
"url": "https://github.com/h2oai/h2o-3/commit/b9ae2d3c5220db2dc53753357a783e590364d044"
}
],
"source": {
"advisory": "6954fe04-b905-453f-8c53-205ac8377e0d",
"discovery": "EXTERNAL"
},
"title": "Remote Code Execution in h2oai/h2o-3"
}
},
"cveMetadata": {
"assignerOrgId": "c09c270a-b464-47c1-9133-acb35b22c19a",
"assignerShortName": "@huntr_ai",
"cveId": "CVE-2026-3960",
"datePublished": "2026-04-23T08:47:48.618Z",
"dateReserved": "2026-03-11T12:52:45.232Z",
"dateUpdated": "2026-04-23T12:29:32.439Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2025-61684 (GCVE-0-2025-61684)
Vulnerability from nvd – Published: 2026-01-19 15:18 – Updated: 2026-01-20 15:49
VLAI
EPSS
VEX
Title
Quicly has assertion failures
Summary
Quicly, an IETF QUIC protocol implementation, is susceptible to a denial-of-service attack prior to commit d9d3df6a8530a102b57d840e39b0311ce5c9e14e. A remote attacker can exploit these bugs to trigger an assertion failure that crashes process using Quicly. Commit d9d3df6a8530a102b57d840e39b0311ce5c9e14e fixes the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-20 - Improper Input Validation
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/h2o/quicly/security/advisories… | x_refsource_CONFIRM |
| https://github.com/h2o/quicly/commit/d9d3df6a8530… | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-61684",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-01-20T15:49:39.447750Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-01-20T15:49:59.004Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "quicly",
"vendor": "h2o",
"versions": [
{
"status": "affected",
"version": "\u003c d9d3df6"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Quicly, an IETF QUIC protocol implementation, is susceptible to a denial-of-service attack prior to commit d9d3df6a8530a102b57d840e39b0311ce5c9e14e. A remote attacker can exploit these bugs to trigger an assertion failure that crashes process using Quicly. Commit d9d3df6a8530a102b57d840e39b0311ce5c9e14e fixes the issue."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-20",
"description": "CWE-20: Improper Input Validation",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-01-19T15:18:11.398Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/h2o/quicly/security/advisories/GHSA-wr3c-345m-43v9",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/h2o/quicly/security/advisories/GHSA-wr3c-345m-43v9"
},
{
"name": "https://github.com/h2o/quicly/commit/d9d3df6a8530a102b57d840e39b0311ce5c9e14e",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/h2o/quicly/commit/d9d3df6a8530a102b57d840e39b0311ce5c9e14e"
}
],
"source": {
"advisory": "GHSA-wr3c-345m-43v9",
"discovery": "UNKNOWN"
},
"title": "Quicly has assertion failures"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2025-61684",
"datePublished": "2026-01-19T15:18:11.398Z",
"dateReserved": "2025-09-29T20:25:16.182Z",
"dateUpdated": "2026-01-20T15:49:59.004Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2025-10769 (GCVE-0-2025-10769)
Vulnerability from nvd – Published: 2025-09-21 09:33 – Updated: 2025-09-22 17:25
VLAI
EPSS
VEX
Title
h2oai h2o-3 H2 JDBC Driver ImportSQLTable deserialization
Summary
A vulnerability has been found in h2oai h2o-3 up to 3.46.08. This affects an unknown function of the file /99/ImportSQLTable of the component H2 JDBC Driver. Such manipulation of the argument connection_url leads to deserialization. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.325125 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.325125 | signaturepermissions-required |
| https://vuldb.com/?submit.649728 | third-party-advisory |
| https://vuldb.com/?submit.649793 | third-party-advisory |
| https://github.com/ez-lbz/poc/issues/51 | exploitissue-tracking |
| https://github.com/ez-lbz/poc/issues/51#issue-339… | exploitissue-tracking |
| https://huntr.com/bounties/4066ce21-7148-44f5-833… | related |
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-10769",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-09-22T17:25:34.976239Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-09-22T17:25:38.765Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/ez-lbz/poc/issues/51"
},
{
"tags": [
"exploit"
],
"url": "https://github.com/ez-lbz/poc/issues/51#issue-3391023368"
},
{
"tags": [
"exploit"
],
"url": "https://huntr.com/bounties/4066ce21-7148-44f5-8336-b1674c2f588d"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"modules": [
"H2 JDBC Driver"
],
"product": "h2o-3",
"vendor": "h2oai",
"versions": [
{
"status": "affected",
"version": "3.46.08"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "ez-lbz (VulDB User)"
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability has been found in h2oai h2o-3 up to 3.46.08. This affects an unknown function of the file /99/ImportSQLTable of the component H2 JDBC Driver. Such manipulation of the argument connection_url leads to deserialization. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way."
},
{
"lang": "de",
"value": "Es wurde eine Schwachstelle in h2oai h2o-3 up to 3.46.08 entdeckt. Betroffen hiervon ist ein unbekannter Ablauf der Datei /99/ImportSQLTable der Komponente H2 JDBC Driver. Durch die Manipulation des Arguments connection_url mit unbekannten Daten kann eine deserialization-Schwachstelle ausgenutzt werden. Der Angriff kann remote ausgef\u00fchrt werden. Der Exploit steht zur \u00f6ffentlichen Verf\u00fcgung."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 6.5,
"vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-502",
"description": "Deserialization",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-20",
"description": "Improper Input Validation",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-09-21T09:33:19.679Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-325125 | h2oai h2o-3 H2 JDBC Driver ImportSQLTable deserialization",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/?id.325125"
},
{
"name": "VDB-325125 | CTI Indicators (IOB, IOC, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/?ctiid.325125"
},
{
"name": "Submit #649728 | h2oai h2o-3 \u003c=v3.46.08 Deserialization",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/?submit.649728"
},
{
"name": "Submit #649793 | h2oai h2o-3 3.46.0.7 Deserialization (Duplicate)",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/?submit.649793"
},
{
"tags": [
"exploit",
"issue-tracking"
],
"url": "https://github.com/ez-lbz/poc/issues/51"
},
{
"tags": [
"exploit",
"issue-tracking"
],
"url": "https://github.com/ez-lbz/poc/issues/51#issue-3391023368"
},
{
"tags": [
"related"
],
"url": "https://huntr.com/bounties/4066ce21-7148-44f5-8336-b1674c2f588d"
}
],
"timeline": [
{
"lang": "en",
"time": "2025-09-21T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2025-09-21T02:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2025-09-21T10:26:32.000Z",
"value": "VulDB entry last update"
}
],
"title": "h2oai h2o-3 H2 JDBC Driver ImportSQLTable deserialization"
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2025-10769",
"datePublished": "2025-09-21T09:33:19.679Z",
"dateReserved": "2025-09-21T08:16:09.091Z",
"dateUpdated": "2025-09-22T17:25:38.765Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
CVE-2025-10768 (GCVE-0-2025-10768)
Vulnerability from nvd – Published: 2025-09-21 09:33 – Updated: 2025-09-22 17:24
VLAI
EPSS
VEX
Title
h2oai h2o-3 IBMDB2 JDBC Driver ImportSQLTable deserialization
Summary
A flaw has been found in h2oai h2o-3 up to 3.46.08. The impacted element is an unknown function of the file /99/ImportSQLTable of the component IBMDB2 JDBC Driver. This manipulation of the argument connection_url causes deserialization. The attack may be initiated remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.325124 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.325124 | signaturepermissions-required |
| https://vuldb.com/?submit.649508 | third-party-advisory |
| https://github.com/ez-lbz/poc/issues/50 | exploitissue-tracking |
| https://github.com/ez-lbz/poc/issues/50#issue-338… | exploitissue-tracking |
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-10768",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-09-22T17:24:13.085698Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-09-22T17:24:16.558Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/ez-lbz/poc/issues/50#issue-3389830879"
},
{
"tags": [
"exploit"
],
"url": "https://github.com/ez-lbz/poc/issues/50"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"modules": [
"IBMDB2 JDBC Driver"
],
"product": "h2o-3",
"vendor": "h2oai",
"versions": [
{
"status": "affected",
"version": "3.46.08"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "ez-lbz (VulDB User)"
}
],
"descriptions": [
{
"lang": "en",
"value": "A flaw has been found in h2oai h2o-3 up to 3.46.08. The impacted element is an unknown function of the file /99/ImportSQLTable of the component IBMDB2 JDBC Driver. This manipulation of the argument connection_url causes deserialization. The attack may be initiated remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way."
},
{
"lang": "de",
"value": "Eine Schwachstelle wurde in h2oai h2o-3 up to 3.46.08 gefunden. Betroffen davon ist ein unbekannter Prozess der Datei /99/ImportSQLTable der Komponente IBMDB2 JDBC Driver. Mit der Manipulation des Arguments connection_url mit unbekannten Daten kann eine deserialization-Schwachstelle ausgenutzt werden. Umgesetzt werden kann der Angriff \u00fcber das Netzwerk. Die Ausnutzung wurde ver\u00f6ffentlicht und kann verwendet werden."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 6.5,
"vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-502",
"description": "Deserialization",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-20",
"description": "Improper Input Validation",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-09-21T09:33:16.643Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-325124 | h2oai h2o-3 IBMDB2 JDBC Driver ImportSQLTable deserialization",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/?id.325124"
},
{
"name": "VDB-325124 | CTI Indicators (IOB, IOC, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/?ctiid.325124"
},
{
"name": "Submit #649508 | h2oai h2o-3 \u003c=v3.46.08 Deserialization",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/?submit.649508"
},
{
"tags": [
"exploit",
"issue-tracking"
],
"url": "https://github.com/ez-lbz/poc/issues/50"
},
{
"tags": [
"exploit",
"issue-tracking"
],
"url": "https://github.com/ez-lbz/poc/issues/50#issue-3389830879"
}
],
"timeline": [
{
"lang": "en",
"time": "2025-09-21T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2025-09-21T02:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2025-09-21T10:21:15.000Z",
"value": "VulDB entry last update"
}
],
"title": "h2oai h2o-3 IBMDB2 JDBC Driver ImportSQLTable deserialization"
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2025-10768",
"datePublished": "2025-09-21T09:33:16.643Z",
"dateReserved": "2025-09-21T08:16:05.733Z",
"dateUpdated": "2025-09-22T17:24:16.558Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
CVE-2026-54340 (GCVE-0-2026-54340)
Vulnerability from cvelistv5 – Published: 2026-07-16 23:29 – Updated: 2026-07-17 18:06
VLAI
EPSS
VEX
Title
h2o has HTTP/2 state amplification
Summary
h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 9265bdd, there is an HTTP/2 state amplification issue that combines HPACK decompression amplification with Slowloris-style stream stalling. Amplified decoded header state can be retained by stalled HTTP/2 streams, and depending on the configuration, additional limits are needed to bound decoded header state and prevent attack. This issue has been fixed by commit 9265bdd.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/h2o/h2o/security/advisories/GH… | x_refsource_CONFIRM |
| https://github.com/h2o/h2o/commit/9265bdd9a996ed9… | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-54340",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-17T15:26:10.914862Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-17T18:06:19.274Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "h2o",
"vendor": "h2o",
"versions": [
{
"status": "affected",
"version": "\u003c 9265bdd"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 9265bdd, there is an HTTP/2 state amplification issue that combines HPACK decompression amplification with Slowloris-style stream stalling. Amplified decoded header state can be retained by stalled HTTP/2 streams, and depending on the configuration, additional limits are needed to bound decoded header state and prevent attack. This issue has been fixed by commit 9265bdd."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400: Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-770",
"description": "CWE-770: Allocation of Resources Without Limits or Throttling",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-16T23:29:50.799Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/h2o/h2o/security/advisories/GHSA-qcrr-wrhc-pgq9",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/h2o/h2o/security/advisories/GHSA-qcrr-wrhc-pgq9"
},
{
"name": "https://github.com/h2o/h2o/commit/9265bdd9a996ed992681055e3996baf3e09d2063",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/h2o/h2o/commit/9265bdd9a996ed992681055e3996baf3e09d2063"
}
],
"source": {
"advisory": "GHSA-qcrr-wrhc-pgq9",
"discovery": "UNKNOWN"
},
"title": "h2o has HTTP/2 state amplification"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-54340",
"datePublished": "2026-07-16T23:29:50.799Z",
"dateReserved": "2026-06-12T19:23:22.316Z",
"dateUpdated": "2026-07-17T18:06:19.274Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-44453 (GCVE-0-2026-44453)
Vulnerability from cvelistv5 – Published: 2026-07-16 23:04 – Updated: 2026-07-17 14:29
VLAI
EPSS
VEX
Title
h2o is vulnerable to musl libc stack overflow
Summary
h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 6b5370d, h2o is vulnerable to a Denial of Service attack when calling alloca under certain conditions. When serving static files, h2o builds the file path on stack, by calling alloca. The maximum size of the memory allocated using alloca can be as huge as ~600KB, which exceeds the default pthread stack size used by musl libc (128KB). If the amount of memory allocated by alloca exceeds the stack size, the h2o server crashes with a segmentation fault, while it tries to touch the guard page. This issue has been fixed by commit 6b5370d.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/h2o/h2o/security/advisories/GH… | x_refsource_CONFIRM |
| https://github.com/h2o/h2o/commit/6b5370d9d09fcf8… | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-44453",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-17T14:29:07.563010Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-17T14:29:15.447Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "h2o",
"vendor": "h2o",
"versions": [
{
"status": "affected",
"version": "\u003c 6b5370d"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 6b5370d, h2o is vulnerable to a Denial of Service attack when calling alloca under certain conditions. When serving static files, h2o builds the file path on stack, by calling alloca. The maximum size of the memory allocated using alloca can be as huge as ~600KB, which exceeds the default pthread stack size used by musl libc (128KB). If the amount of memory allocated by alloca exceeds the stack size, the h2o server crashes with a segmentation fault, while it tries to touch the guard page. This issue has been fixed by commit 6b5370d."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-789",
"description": "CWE-789: Memory Allocation with Excessive Size Value",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-770",
"description": "CWE-770: Allocation of Resources Without Limits or Throttling",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-16T23:04:41.756Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/h2o/h2o/security/advisories/GHSA-rf9v-m59p-mq84",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/h2o/h2o/security/advisories/GHSA-rf9v-m59p-mq84"
},
{
"name": "https://github.com/h2o/h2o/commit/6b5370d9d09fcf83aa7620ddf77de1954a192181",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/h2o/h2o/commit/6b5370d9d09fcf83aa7620ddf77de1954a192181"
}
],
"source": {
"advisory": "GHSA-rf9v-m59p-mq84",
"discovery": "UNKNOWN"
},
"title": "h2o is vulnerable to musl libc stack overflow"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-44453",
"datePublished": "2026-07-16T23:04:41.756Z",
"dateReserved": "2026-05-06T15:49:25.192Z",
"dateUpdated": "2026-07-17T14:29:15.447Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-44452 (GCVE-0-2026-44452)
Vulnerability from cvelistv5 – Published: 2026-07-16 22:54 – Updated: 2026-07-17 14:03
VLAI
EPSS
VEX
Title
h2o is vulnerable to heap overrun
Summary
h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 8dc37cb, when h2o receives a ClientHello message over TLS or QUIC and it contains a zero-length SNI extension, the h2o server runs over the zero-length hostname while trying to copy the hostname, assuming that it is NULL-terminated. This is a potential denial-of-service attack vector in sense that it might trigger segmentation violation. This issue has been fixed by commit 8dc37cb.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/h2o/h2o/security/advisories/GH… | x_refsource_CONFIRM |
| https://github.com/h2o/h2o/commit/8dc37cb1e6171f7… | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-44452",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-17T14:03:32.725590Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-17T14:03:52.757Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "h2o",
"vendor": "h2o",
"versions": [
{
"status": "affected",
"version": "\u003c 8dc37cb"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 8dc37cb, when h2o receives a ClientHello message over TLS or QUIC and it contains a zero-length SNI extension, the h2o server runs over the zero-length hostname while trying to copy the hostname, assuming that it is NULL-terminated. This is a potential denial-of-service attack vector in sense that it might trigger segmentation violation. This issue has been fixed by commit 8dc37cb."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-125",
"description": "CWE-125: Out-of-bounds Read",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-170",
"description": "CWE-170: Improper Null Termination",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-16T22:54:42.914Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/h2o/h2o/security/advisories/GHSA-w68q-rqwx-7wvq",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/h2o/h2o/security/advisories/GHSA-w68q-rqwx-7wvq"
},
{
"name": "https://github.com/h2o/h2o/commit/8dc37cb1e6171f7f772667618ea440696fed82c3",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/h2o/h2o/commit/8dc37cb1e6171f7f772667618ea440696fed82c3"
}
],
"source": {
"advisory": "GHSA-w68q-rqwx-7wvq",
"discovery": "UNKNOWN"
},
"title": "h2o is vulnerable to heap overrun"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-44452",
"datePublished": "2026-07-16T22:54:42.914Z",
"dateReserved": "2026-05-06T15:49:25.192Z",
"dateUpdated": "2026-07-17T14:03:52.757Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-44436 (GCVE-0-2026-44436)
Vulnerability from cvelistv5 – Published: 2026-07-16 22:44 – Updated: 2026-07-17 10:48
VLAI
EPSS
VEX
Title
Quicly is vulnerable to connection state corruption
Summary
Quicly is an IETF QUIC protocol implementation intended primarily for use within the H2O HTTP server. Prior to commit 8b178e6, Quicly is vulnerable to a Denial of Service attack through connection state corruption. In QUIC Invariants, the maximum length of a Connection ID is 255 bytes, while QUIC version 1 further restricts the maximum to 20 bytes. Quicly implements QUIC version 1 and therefore its CID buffers are limited to 20 bytes. However, to be able to respond to unknown versions of QUIC, its packet decoder accepts Connection IDs of up to 255 bytes. As its CID buffers are merely 20 bytes long, Quicly must reject QUIC version 1 packets with Connection IDs longer than that. The command line tool bundled with Quicly has had that check, however the library itself lacked such enforcement. As a consequence, when used by applications that lack their own enforcement, the connection state becoming inconsistent to buffer overrun. Fortunately, the overflow stops within the allocated chunk of memory, but nevertheless, the bug leads to assertion failures. This issue has been fixed by commit 8b178e6.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/h2o/quicly/security/advisories… | x_refsource_CONFIRM |
| https://github.com/h2o/quicly/commit/8b178e692c51… | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-44436",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-17T10:48:23.373806Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-17T10:48:33.974Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "quicly",
"vendor": "h2o",
"versions": [
{
"status": "affected",
"version": "\u003c 8b178e6"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Quicly is an IETF QUIC protocol implementation intended primarily for use within the H2O HTTP server. Prior to commit 8b178e6, Quicly is vulnerable to a Denial of Service attack through connection state corruption. In QUIC Invariants, the maximum length of a Connection ID is 255 bytes, while QUIC version 1 further restricts the maximum to 20 bytes. Quicly implements QUIC version 1 and therefore its CID buffers are limited to 20 bytes. However, to be able to respond to unknown versions of QUIC, its packet decoder accepts Connection IDs of up to 255 bytes. As its CID buffers are merely 20 bytes long, Quicly must reject QUIC version 1 packets with Connection IDs longer than that. The command line tool bundled with Quicly has had that check, however the library itself lacked such enforcement. As a consequence, when used by applications that lack their own enforcement, the connection state becoming inconsistent to buffer overrun. Fortunately, the overflow stops within the allocated chunk of memory, but nevertheless, the bug leads to assertion failures. This issue has been fixed by commit 8b178e6."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-120",
"description": "CWE-120: Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-787",
"description": "CWE-787: Out-of-bounds Write",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-16T22:44:34.254Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/h2o/quicly/security/advisories/GHSA-v55w-59qx-2v78",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/h2o/quicly/security/advisories/GHSA-v55w-59qx-2v78"
},
{
"name": "https://github.com/h2o/quicly/commit/8b178e692c51a3b1031612ef89f03a53aac63c15",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/h2o/quicly/commit/8b178e692c51a3b1031612ef89f03a53aac63c15"
}
],
"source": {
"advisory": "GHSA-v55w-59qx-2v78",
"discovery": "UNKNOWN"
},
"title": "Quicly is vulnerable to connection state corruption"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-44436",
"datePublished": "2026-07-16T22:44:34.254Z",
"dateReserved": "2026-05-06T14:40:00.954Z",
"dateUpdated": "2026-07-17T10:48:33.974Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-44435 (GCVE-0-2026-44435)
Vulnerability from cvelistv5 – Published: 2026-07-16 22:39 – Updated: 2026-07-17 13:02
VLAI
EPSS
VEX
Title
Quicly: Remote Denial of Service via assertion failure when CRYPTO stream handshake data exceeds 32KB
Summary
Quicly is an IETF QUIC protocol implementation intended primarily for use within the H2O HTTP server. Prior to commit 937d0e9, an assertion failure is raised when the total number of valid handshake messages received over a CRYPTO stream of a single packet number space exceeds 32KB, causing a Denial of Service. This issue has been fixed by commit 937d0e9.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/h2o/quicly/security/advisories… | x_refsource_CONFIRM |
| https://github.com/h2o/quicly/commit/937d0e9e7c66… | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-44435",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-17T13:02:47.698484Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-17T13:02:55.330Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "quicly",
"vendor": "h2o",
"versions": [
{
"status": "affected",
"version": "\u003c 937d0e9"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Quicly is an IETF QUIC protocol implementation intended primarily for use within the H2O HTTP server. Prior to commit 937d0e9, an assertion failure is raised when the total number of valid handshake messages received over a CRYPTO stream of a single packet number space exceeds 32KB, causing a Denial of Service. This issue has been fixed by commit 937d0e9."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-617",
"description": "CWE-617: Reachable Assertion",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400: Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-16T22:39:50.873Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/h2o/quicly/security/advisories/GHSA-2cw9-5673-73gv",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/h2o/quicly/security/advisories/GHSA-2cw9-5673-73gv"
},
{
"name": "https://github.com/h2o/quicly/commit/937d0e9e7c669fc2bee4920632ab6aaac60e4d81",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/h2o/quicly/commit/937d0e9e7c669fc2bee4920632ab6aaac60e4d81"
}
],
"source": {
"advisory": "GHSA-2cw9-5673-73gv",
"discovery": "UNKNOWN"
},
"title": "Quicly: Remote Denial of Service via assertion failure when CRYPTO stream handshake data exceeds 32KB"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-44435",
"datePublished": "2026-07-16T22:39:50.873Z",
"dateReserved": "2026-05-06T14:40:00.954Z",
"dateUpdated": "2026-07-17T13:02:55.330Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-44434 (GCVE-0-2026-44434)
Vulnerability from cvelistv5 – Published: 2026-07-16 22:34 – Updated: 2026-07-18 03:21
VLAI
EPSS
VEX
Title
Quicly is vulnerable to stateless reset injection
Summary
Quicly is an IETF QUIC protocol implementation intended primarily for use within the H2O HTTP server. Prior to commit dccf5d4, Quicly was vulnerable to stateless reset injection through lack of packet entry validation. The QUIC protocol is designed to withstand packet injection attacks, once the handshake is complete. Only packets that carry some secret patterns are considered as stateless resets. Quicly allows the peer to share up to 4 such patterns per connection. However, until now, it failed to determine which of the 4 slots that it uses to retain the secret patterns contains a valid entry. As the slots are zero-initialized, the failure meant that, unless the peer advertised 4 of such patterns, an all-zero pattern was treated as a stateless reset.In effect, this allowed an on-path attacker to reset QUIC connections governed by Quicly. This issue has been fixed by commit dccf5d4.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/h2o/quicly/security/advisories… | x_refsource_CONFIRM |
| https://github.com/h2o/quicly/commit/dccf5d4579c7… | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-44434",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-18T03:21:11.398981Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-18T03:21:24.526Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "quicly",
"vendor": "h2o",
"versions": [
{
"status": "affected",
"version": "\u003c dccf5d4"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Quicly is an IETF QUIC protocol implementation intended primarily for use within the H2O HTTP server. Prior to commit dccf5d4, Quicly was vulnerable to stateless reset injection through lack of packet entry validation. The QUIC protocol is designed to withstand packet injection attacks, once the handshake is complete. Only packets that carry some secret patterns are considered as stateless resets. Quicly allows the peer to share up to 4 such patterns per connection. However, until now, it failed to determine which of the 4 slots that it uses to retain the secret patterns contains a valid entry. As the slots are zero-initialized, the failure meant that, unless the peer advertised 4 of such patterns, an all-zero pattern was treated as a stateless reset.In effect, this allowed an on-path attacker to reset QUIC connections governed by Quicly. This issue has been fixed by commit dccf5d4."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-345",
"description": "CWE-345: Insufficient Verification of Data Authenticity",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-665",
"description": "CWE-665: Improper Initialization",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-16T22:34:09.386Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/h2o/quicly/security/advisories/GHSA-899f-49jq-pfh8",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/h2o/quicly/security/advisories/GHSA-899f-49jq-pfh8"
},
{
"name": "https://github.com/h2o/quicly/commit/dccf5d4579c7ae9dd6e8f90c36d52e311bb60710",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/h2o/quicly/commit/dccf5d4579c7ae9dd6e8f90c36d52e311bb60710"
}
],
"source": {
"advisory": "GHSA-899f-49jq-pfh8",
"discovery": "UNKNOWN"
},
"title": "Quicly is vulnerable to stateless reset injection"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-44434",
"datePublished": "2026-07-16T22:34:09.386Z",
"dateReserved": "2026-05-06T14:40:00.954Z",
"dateUpdated": "2026-07-18T03:21:24.526Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-44433 (GCVE-0-2026-44433)
Vulnerability from cvelistv5 – Published: 2026-07-16 22:23 – Updated: 2026-07-17 18:06
VLAI
EPSS
VEX
Title
Quicly is vulnerable to memory exhaustion
Summary
Quicly is an IETF QUIC protocol implementation intended primarily for use within the H2O HTTP server. Prior to commit 8b178e6, an adversarial peer could send a STREAM frame carrying just one byte at the largest offset being permitted to obtain additional flow control credit, which under certain circumstances could lead to a Denial of Service. Assuming the application prepares a receive buffer for storing all data that arrive out-of-order, up to the largest offset being received, this behavior could lead to the application allocating large amount of memory with the peer sending only a handful of packets, resulting in memory exhaustion. In addition to the receive buffer allocation strategy, the severity of this vulnerability depends on how the application controls the stream concurrency. In case of the H2O HTTP server, under its default setting, this bug increases the maximum amount of memory allocated per connection by about 4 times. This issue has been fixed by commit 8b178e6.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/h2o/quicly/security/advisories… | x_refsource_CONFIRM |
| https://github.com/h2o/quicly/commit/8b178e692c51… | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-44433",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-17T15:26:30.321361Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-17T18:06:23.088Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "quicly",
"vendor": "h2o",
"versions": [
{
"status": "affected",
"version": "\u003c 8b178e6"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Quicly is an IETF QUIC protocol implementation intended primarily for use within the H2O HTTP server. Prior to commit 8b178e6, an adversarial peer could send a STREAM frame carrying just one byte at the largest offset being permitted to obtain additional flow control credit, which under certain circumstances could lead to a Denial of Service. Assuming the application prepares a receive buffer for storing all data that arrive out-of-order, up to the largest offset being received, this behavior could lead to the application allocating large amount of memory with the peer sending only a handful of packets, resulting in memory exhaustion. In addition to the receive buffer allocation strategy, the severity of this vulnerability depends on how the application controls the stream concurrency. In case of the H2O HTTP server, under its default setting, this bug increases the maximum amount of memory allocated per connection by about 4 times. This issue has been fixed by commit 8b178e6."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-770",
"description": "CWE-770: Allocation of Resources Without Limits or Throttling",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400: Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-16T22:23:17.247Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/h2o/quicly/security/advisories/GHSA-f7qr-4p37-9gx9",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/h2o/quicly/security/advisories/GHSA-f7qr-4p37-9gx9"
},
{
"name": "https://github.com/h2o/quicly/commit/8b178e692c51a3b1031612ef89f03a53aac63c15",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/h2o/quicly/commit/8b178e692c51a3b1031612ef89f03a53aac63c15"
}
],
"source": {
"advisory": "GHSA-f7qr-4p37-9gx9",
"discovery": "UNKNOWN"
},
"title": "Quicly is vulnerable to memory exhaustion"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-44433",
"datePublished": "2026-07-16T22:23:17.247Z",
"dateReserved": "2026-05-06T14:40:00.954Z",
"dateUpdated": "2026-07-17T18:06:23.088Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-55213 (GCVE-0-2026-55213)
Vulnerability from cvelistv5 – Published: 2026-07-10 20:49 – Updated: 2026-07-13 14:14
VLAI
EPSS
VEX
Title
h2o: musl libc stack overflow (QPACK)
Summary
h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit edd7a120bfc4af11ac0cbebce2a43cc1f93f9af1, when h2o processes a QPACK instruction sent from the peer over HTTP/3, lib/http3/qpack.c might allocate an on-stack buffer as large as approximately 800 KB by calling alloca, which exceeds the default pthread stack size used by musl libc and causes the h2o server to crash with a segmentation fault while touching the guard page. This issue is fixed in commit edd7a120bfc4af11ac0cbebce2a43cc1f93f9af1.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/h2o/h2o/security/advisories/GH… | x_refsource_CONFIRM |
| https://github.com/h2o/h2o/commit/edd7a120bfc4af1… | x_refsource_MISC |
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-55213",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-13T14:14:29.008624Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-13T14:14:45.685Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "h2o",
"vendor": "h2o",
"versions": [
{
"status": "affected",
"version": "\u003c edd7a120bfc4af11ac0cbebce2a43cc1f93f9af1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit edd7a120bfc4af11ac0cbebce2a43cc1f93f9af1, when h2o processes a QPACK instruction sent from the peer over HTTP/3, lib/http3/qpack.c might allocate an on-stack buffer as large as approximately 800 KB by calling alloca, which exceeds the default pthread stack size used by musl libc and causes the h2o server to crash with a segmentation fault while touching the guard page. This issue is fixed in commit edd7a120bfc4af11ac0cbebce2a43cc1f93f9af1."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-789",
"description": "CWE-789: Memory Allocation with Excessive Size Value",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-10T20:49:58.764Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/h2o/h2o/security/advisories/GHSA-432c-8xmj-frmq",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/h2o/h2o/security/advisories/GHSA-432c-8xmj-frmq"
},
{
"name": "https://github.com/h2o/h2o/commit/edd7a120bfc4af11ac0cbebce2a43cc1f93f9af1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/h2o/h2o/commit/edd7a120bfc4af11ac0cbebce2a43cc1f93f9af1"
}
],
"source": {
"advisory": "GHSA-432c-8xmj-frmq",
"discovery": "UNKNOWN"
},
"title": "h2o: musl libc stack overflow (QPACK)"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-55213",
"datePublished": "2026-07-10T20:49:58.764Z",
"dateReserved": "2026-06-16T16:16:32.627Z",
"dateUpdated": "2026-07-13T14:14:45.685Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-8752 (GCVE-0-2026-8752)
Vulnerability from cvelistv5 – Published: 2026-05-17 11:45 – Updated: 2026-05-18 14:39
VLAI
EPSS
VEX
Title
h2oai h2o-3 Rapids setproperty Primitive AstSetProperty.java exec access control
Summary
A weakness has been identified in h2oai h2o-3 up to 7402. This vulnerability affects the function exec of the file h2o-core/src/main/java/water/rapids/ast/prims/misc/AstSetProperty.java of the component Rapids setproperty Primitive Handler. Executing a manipulation can lead to improper access controls. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/364379 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/364379/cti | signaturepermissions-required |
| https://vuldb.com/submit/810108 | third-party-advisory |
| https://vulnplus-note.wetolink.com/share/pyVa0GWPuAZE | exploit |
Impacted products
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-8752",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-18T14:38:58.874014Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-05-18T14:39:10.246Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:h2oai:h2o-3:*:*:*:*:*:*:*:*"
],
"modules": [
"Rapids setproperty Primitive Handler"
],
"product": "h2o-3",
"vendor": "h2oai",
"versions": [
{
"status": "affected",
"version": "7402"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "vulnplusbot (VulDB User)"
},
{
"lang": "en",
"type": "coordinator",
"value": "VulDB CNA Team"
}
],
"descriptions": [
{
"lang": "en",
"value": "A weakness has been identified in h2oai h2o-3 up to 7402. This vulnerability affects the function exec of the file h2o-core/src/main/java/water/rapids/ast/prims/misc/AstSetProperty.java of the component Rapids setproperty Primitive Handler. Executing a manipulation can lead to improper access controls. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 6.9,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 5,
"vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N/E:POC/RL:ND/RC:UR",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-284",
"description": "Improper Access Controls",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-266",
"description": "Incorrect Privilege Assignment",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-17T11:45:11.583Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-364379 | h2oai h2o-3 Rapids setproperty Primitive AstSetProperty.java exec access control",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/vuln/364379"
},
{
"name": "VDB-364379 | CTI Indicators (IOB, IOC, TTP, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/vuln/364379/cti"
},
{
"name": "Submit #810108 | H2O-3 latest pre-auth logic flaw",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/submit/810108"
},
{
"tags": [
"exploit"
],
"url": "https://vulnplus-note.wetolink.com/share/pyVa0GWPuAZE"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-05-16T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2026-05-16T02:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2026-05-16T18:25:57.000Z",
"value": "VulDB entry last update"
}
],
"title": "h2oai h2o-3 Rapids setproperty Primitive AstSetProperty.java exec access control"
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2026-8752",
"datePublished": "2026-05-17T11:45:11.583Z",
"dateReserved": "2026-05-16T16:20:47.483Z",
"dateUpdated": "2026-05-18T14:39:10.246Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-8751 (GCVE-0-2026-8751)
Vulnerability from cvelistv5 – Published: 2026-05-17 11:30 – Updated: 2026-05-18 14:19
VLAI
EPSS
VEX
Title
h2oai h2o-3 JAR Model.java importBinaryModel deserialization
Summary
A security flaw has been discovered in h2oai h2o-3 up to 7402. This affects the function importBinaryModel of the file h2o-core/src/main/java/hex/Model.java of the component JAR Handler. Performing a manipulation results in deserialization. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/364378 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/364378/cti | signaturepermissions-required |
| https://vuldb.com/submit/810107 | third-party-advisory |
| https://vulnplus-note.wetolink.com/share/b5nsQg6EcsBS | exploit |
Impacted products
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-8751",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-18T14:19:11.478608Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-05-18T14:19:22.677Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:h2oai:h2o-3:*:*:*:*:*:*:*:*"
],
"modules": [
"JAR Handler"
],
"product": "h2o-3",
"vendor": "h2oai",
"versions": [
{
"status": "affected",
"version": "7402"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "vulnplusbot (VulDB User)"
},
{
"lang": "en",
"type": "coordinator",
"value": "VulDB CNA Team"
}
],
"descriptions": [
{
"lang": "en",
"value": "A security flaw has been discovered in h2oai h2o-3 up to 7402. This affects the function importBinaryModel of the file h2o-core/src/main/java/hex/Model.java of the component JAR Handler. Performing a manipulation results in deserialization. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 6.9,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 7.3,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 7.3,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 7.5,
"vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-502",
"description": "Deserialization",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-20",
"description": "Improper Input Validation",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-17T11:30:10.692Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-364378 | h2oai h2o-3 JAR Model.java importBinaryModel deserialization",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/vuln/364378"
},
{
"name": "VDB-364378 | CTI Indicators (IOB, IOC, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/vuln/364378/cti"
},
{
"name": "Submit #810107 | H2O-3 latest Pre-Auth Insecure Deserialization",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/submit/810107"
},
{
"tags": [
"exploit"
],
"url": "https://vulnplus-note.wetolink.com/share/b5nsQg6EcsBS"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-05-16T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2026-05-16T02:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2026-05-16T18:25:55.000Z",
"value": "VulDB entry last update"
}
],
"title": "h2oai h2o-3 JAR Model.java importBinaryModel deserialization"
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2026-8751",
"datePublished": "2026-05-17T11:30:10.692Z",
"dateReserved": "2026-05-16T16:20:44.883Z",
"dateUpdated": "2026-05-18T14:19:22.677Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-8750 (GCVE-0-2026-8750)
Vulnerability from cvelistv5 – Published: 2026-05-17 10:45 – Updated: 2026-05-18 17:53
VLAI
EPSS
VEX
Title
h2oai h2o-3 ImportFile API PersistNFS.java importFiles information disclosure
Summary
A vulnerability was identified in h2oai h2o-3 up to 7402. Affected by this issue is the function importFiles of the file h2o-core/src/main/java/water/persist/PersistNFS.java of the component ImportFile API. Such manipulation leads to information disclosure. The attack can be executed remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/364377 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/364377/cti | signaturepermissions-required |
| https://vuldb.com/submit/810105 | third-party-advisory |
| https://vulnplus-note.wetolink.com/share/wWjmsfKHRJi3 | exploit |
Impacted products
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-8750",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-18T17:11:10.715335Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-05-18T17:53:03.393Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:h2oai:h2o-3:*:*:*:*:*:*:*:*"
],
"modules": [
"ImportFile API"
],
"product": "h2o-3",
"vendor": "h2oai",
"versions": [
{
"status": "affected",
"version": "7402"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "vulnplusbot (VulDB User)"
},
{
"lang": "en",
"type": "coordinator",
"value": "VulDB CNA Team"
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability was identified in h2oai h2o-3 up to 7402. Affected by this issue is the function importFiles of the file h2o-core/src/main/java/water/persist/PersistNFS.java of the component ImportFile API. Such manipulation leads to information disclosure. The attack can be executed remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 6.9,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 5,
"vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N/E:POC/RL:ND/RC:UR",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-200",
"description": "Information Disclosure",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-284",
"description": "Improper Access Controls",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-17T10:45:10.231Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-364377 | h2oai h2o-3 ImportFile API PersistNFS.java importFiles information disclosure",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/vuln/364377"
},
{
"name": "VDB-364377 | CTI Indicators (IOB, IOC, TTP, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/vuln/364377/cti"
},
{
"name": "Submit #810105 | H2O-3 latest arbitrary local file disclosure",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/submit/810105"
},
{
"tags": [
"exploit"
],
"url": "https://vulnplus-note.wetolink.com/share/wWjmsfKHRJi3"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-05-16T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2026-05-16T02:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2026-05-16T18:25:52.000Z",
"value": "VulDB entry last update"
}
],
"title": "h2oai h2o-3 ImportFile API PersistNFS.java importFiles information disclosure"
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2026-8750",
"datePublished": "2026-05-17T10:45:10.231Z",
"dateReserved": "2026-05-16T16:20:42.111Z",
"dateUpdated": "2026-05-18T17:53:03.393Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-3960 (GCVE-0-2026-3960)
Vulnerability from cvelistv5 – Published: 2026-04-23 08:47 – Updated: 2026-04-23 12:29
VLAI
EPSS
VEX
Title
Remote Code Execution in h2oai/h2o-3
Summary
A critical remote code execution vulnerability exists in the unauthenticated REST API endpoint /99/ImportSQLTable in H2O-3 version 3.46.0.9 and prior. The vulnerability arises due to insufficient security controls in the parameter blacklist mechanism, which only targets MySQL JDBC driver-specific dangerous parameters. An attacker can bypass these controls by switching the JDBC URL protocol to jdbc:postgresql: and exploiting PostgreSQL JDBC driver-specific parameters such as socketFactory and socketFactoryArg. This allows unauthenticated attackers to execute arbitrary code on the H2O-3 server with the privileges of the H2O-3 process. The issue is resolved in version 3.46.0.10.
Severity
5.9 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-94 - Improper Control of Generation of Code
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| h2oai | h2oai/h2o-3 |
Affected:
unspecified , < 3.46.0.10
(custom)
|
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-3960",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-23T12:25:29.022861Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-04-23T12:29:32.439Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "h2oai/h2o-3",
"vendor": "h2oai",
"versions": [
{
"lessThan": "3.46.0.10",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A critical remote code execution vulnerability exists in the unauthenticated REST API endpoint /99/ImportSQLTable in H2O-3 version 3.46.0.9 and prior. The vulnerability arises due to insufficient security controls in the parameter blacklist mechanism, which only targets MySQL JDBC driver-specific dangerous parameters. An attacker can bypass these controls by switching the JDBC URL protocol to jdbc:postgresql: and exploiting PostgreSQL JDBC driver-specific parameters such as socketFactory and socketFactoryArg. This allows unauthenticated attackers to execute arbitrary code on the H2O-3 server with the privileges of the H2O-3 process. The issue is resolved in version 3.46.0.10."
}
],
"metrics": [
{
"cvssV3_0": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-94",
"description": "CWE-94 Improper Control of Generation of Code",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-04-23T08:47:48.618Z",
"orgId": "c09c270a-b464-47c1-9133-acb35b22c19a",
"shortName": "@huntr_ai"
},
"references": [
{
"url": "https://huntr.com/bounties/6954fe04-b905-453f-8c53-205ac8377e0d"
},
{
"url": "https://github.com/h2oai/h2o-3/commit/b9ae2d3c5220db2dc53753357a783e590364d044"
}
],
"source": {
"advisory": "6954fe04-b905-453f-8c53-205ac8377e0d",
"discovery": "EXTERNAL"
},
"title": "Remote Code Execution in h2oai/h2o-3"
}
},
"cveMetadata": {
"assignerOrgId": "c09c270a-b464-47c1-9133-acb35b22c19a",
"assignerShortName": "@huntr_ai",
"cveId": "CVE-2026-3960",
"datePublished": "2026-04-23T08:47:48.618Z",
"dateReserved": "2026-03-11T12:52:45.232Z",
"dateUpdated": "2026-04-23T12:29:32.439Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2025-61684 (GCVE-0-2025-61684)
Vulnerability from cvelistv5 – Published: 2026-01-19 15:18 – Updated: 2026-01-20 15:49
VLAI
EPSS
VEX
Title
Quicly has assertion failures
Summary
Quicly, an IETF QUIC protocol implementation, is susceptible to a denial-of-service attack prior to commit d9d3df6a8530a102b57d840e39b0311ce5c9e14e. A remote attacker can exploit these bugs to trigger an assertion failure that crashes process using Quicly. Commit d9d3df6a8530a102b57d840e39b0311ce5c9e14e fixes the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-20 - Improper Input Validation
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/h2o/quicly/security/advisories… | x_refsource_CONFIRM |
| https://github.com/h2o/quicly/commit/d9d3df6a8530… | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-61684",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-01-20T15:49:39.447750Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-01-20T15:49:59.004Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "quicly",
"vendor": "h2o",
"versions": [
{
"status": "affected",
"version": "\u003c d9d3df6"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Quicly, an IETF QUIC protocol implementation, is susceptible to a denial-of-service attack prior to commit d9d3df6a8530a102b57d840e39b0311ce5c9e14e. A remote attacker can exploit these bugs to trigger an assertion failure that crashes process using Quicly. Commit d9d3df6a8530a102b57d840e39b0311ce5c9e14e fixes the issue."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-20",
"description": "CWE-20: Improper Input Validation",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-01-19T15:18:11.398Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/h2o/quicly/security/advisories/GHSA-wr3c-345m-43v9",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/h2o/quicly/security/advisories/GHSA-wr3c-345m-43v9"
},
{
"name": "https://github.com/h2o/quicly/commit/d9d3df6a8530a102b57d840e39b0311ce5c9e14e",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/h2o/quicly/commit/d9d3df6a8530a102b57d840e39b0311ce5c9e14e"
}
],
"source": {
"advisory": "GHSA-wr3c-345m-43v9",
"discovery": "UNKNOWN"
},
"title": "Quicly has assertion failures"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2025-61684",
"datePublished": "2026-01-19T15:18:11.398Z",
"dateReserved": "2025-09-29T20:25:16.182Z",
"dateUpdated": "2026-01-20T15:49:59.004Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2025-10769 (GCVE-0-2025-10769)
Vulnerability from cvelistv5 – Published: 2025-09-21 09:33 – Updated: 2025-09-22 17:25
VLAI
EPSS
VEX
Title
h2oai h2o-3 H2 JDBC Driver ImportSQLTable deserialization
Summary
A vulnerability has been found in h2oai h2o-3 up to 3.46.08. This affects an unknown function of the file /99/ImportSQLTable of the component H2 JDBC Driver. Such manipulation of the argument connection_url leads to deserialization. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.325125 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.325125 | signaturepermissions-required |
| https://vuldb.com/?submit.649728 | third-party-advisory |
| https://vuldb.com/?submit.649793 | third-party-advisory |
| https://github.com/ez-lbz/poc/issues/51 | exploitissue-tracking |
| https://github.com/ez-lbz/poc/issues/51#issue-339… | exploitissue-tracking |
| https://huntr.com/bounties/4066ce21-7148-44f5-833… | related |
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-10769",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-09-22T17:25:34.976239Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-09-22T17:25:38.765Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/ez-lbz/poc/issues/51"
},
{
"tags": [
"exploit"
],
"url": "https://github.com/ez-lbz/poc/issues/51#issue-3391023368"
},
{
"tags": [
"exploit"
],
"url": "https://huntr.com/bounties/4066ce21-7148-44f5-8336-b1674c2f588d"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"modules": [
"H2 JDBC Driver"
],
"product": "h2o-3",
"vendor": "h2oai",
"versions": [
{
"status": "affected",
"version": "3.46.08"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "ez-lbz (VulDB User)"
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability has been found in h2oai h2o-3 up to 3.46.08. This affects an unknown function of the file /99/ImportSQLTable of the component H2 JDBC Driver. Such manipulation of the argument connection_url leads to deserialization. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way."
},
{
"lang": "de",
"value": "Es wurde eine Schwachstelle in h2oai h2o-3 up to 3.46.08 entdeckt. Betroffen hiervon ist ein unbekannter Ablauf der Datei /99/ImportSQLTable der Komponente H2 JDBC Driver. Durch die Manipulation des Arguments connection_url mit unbekannten Daten kann eine deserialization-Schwachstelle ausgenutzt werden. Der Angriff kann remote ausgef\u00fchrt werden. Der Exploit steht zur \u00f6ffentlichen Verf\u00fcgung."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 6.5,
"vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-502",
"description": "Deserialization",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-20",
"description": "Improper Input Validation",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-09-21T09:33:19.679Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-325125 | h2oai h2o-3 H2 JDBC Driver ImportSQLTable deserialization",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/?id.325125"
},
{
"name": "VDB-325125 | CTI Indicators (IOB, IOC, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/?ctiid.325125"
},
{
"name": "Submit #649728 | h2oai h2o-3 \u003c=v3.46.08 Deserialization",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/?submit.649728"
},
{
"name": "Submit #649793 | h2oai h2o-3 3.46.0.7 Deserialization (Duplicate)",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/?submit.649793"
},
{
"tags": [
"exploit",
"issue-tracking"
],
"url": "https://github.com/ez-lbz/poc/issues/51"
},
{
"tags": [
"exploit",
"issue-tracking"
],
"url": "https://github.com/ez-lbz/poc/issues/51#issue-3391023368"
},
{
"tags": [
"related"
],
"url": "https://huntr.com/bounties/4066ce21-7148-44f5-8336-b1674c2f588d"
}
],
"timeline": [
{
"lang": "en",
"time": "2025-09-21T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2025-09-21T02:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2025-09-21T10:26:32.000Z",
"value": "VulDB entry last update"
}
],
"title": "h2oai h2o-3 H2 JDBC Driver ImportSQLTable deserialization"
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2025-10769",
"datePublished": "2025-09-21T09:33:19.679Z",
"dateReserved": "2025-09-21T08:16:09.091Z",
"dateUpdated": "2025-09-22T17:25:38.765Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
CVE-2025-10768 (GCVE-0-2025-10768)
Vulnerability from cvelistv5 – Published: 2025-09-21 09:33 – Updated: 2025-09-22 17:24
VLAI
EPSS
VEX
Title
h2oai h2o-3 IBMDB2 JDBC Driver ImportSQLTable deserialization
Summary
A flaw has been found in h2oai h2o-3 up to 3.46.08. The impacted element is an unknown function of the file /99/ImportSQLTable of the component IBMDB2 JDBC Driver. This manipulation of the argument connection_url causes deserialization. The attack may be initiated remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.325124 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.325124 | signaturepermissions-required |
| https://vuldb.com/?submit.649508 | third-party-advisory |
| https://github.com/ez-lbz/poc/issues/50 | exploitissue-tracking |
| https://github.com/ez-lbz/poc/issues/50#issue-338… | exploitissue-tracking |
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-10768",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-09-22T17:24:13.085698Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-09-22T17:24:16.558Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/ez-lbz/poc/issues/50#issue-3389830879"
},
{
"tags": [
"exploit"
],
"url": "https://github.com/ez-lbz/poc/issues/50"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"modules": [
"IBMDB2 JDBC Driver"
],
"product": "h2o-3",
"vendor": "h2oai",
"versions": [
{
"status": "affected",
"version": "3.46.08"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "ez-lbz (VulDB User)"
}
],
"descriptions": [
{
"lang": "en",
"value": "A flaw has been found in h2oai h2o-3 up to 3.46.08. The impacted element is an unknown function of the file /99/ImportSQLTable of the component IBMDB2 JDBC Driver. This manipulation of the argument connection_url causes deserialization. The attack may be initiated remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way."
},
{
"lang": "de",
"value": "Eine Schwachstelle wurde in h2oai h2o-3 up to 3.46.08 gefunden. Betroffen davon ist ein unbekannter Prozess der Datei /99/ImportSQLTable der Komponente IBMDB2 JDBC Driver. Mit der Manipulation des Arguments connection_url mit unbekannten Daten kann eine deserialization-Schwachstelle ausgenutzt werden. Umgesetzt werden kann der Angriff \u00fcber das Netzwerk. Die Ausnutzung wurde ver\u00f6ffentlicht und kann verwendet werden."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 6.5,
"vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-502",
"description": "Deserialization",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-20",
"description": "Improper Input Validation",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-09-21T09:33:16.643Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-325124 | h2oai h2o-3 IBMDB2 JDBC Driver ImportSQLTable deserialization",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/?id.325124"
},
{
"name": "VDB-325124 | CTI Indicators (IOB, IOC, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/?ctiid.325124"
},
{
"name": "Submit #649508 | h2oai h2o-3 \u003c=v3.46.08 Deserialization",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/?submit.649508"
},
{
"tags": [
"exploit",
"issue-tracking"
],
"url": "https://github.com/ez-lbz/poc/issues/50"
},
{
"tags": [
"exploit",
"issue-tracking"
],
"url": "https://github.com/ez-lbz/poc/issues/50#issue-3389830879"
}
],
"timeline": [
{
"lang": "en",
"time": "2025-09-21T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2025-09-21T02:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2025-09-21T10:21:15.000Z",
"value": "VulDB entry last update"
}
],
"title": "h2oai h2o-3 IBMDB2 JDBC Driver ImportSQLTable deserialization"
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2025-10768",
"datePublished": "2025-09-21T09:33:16.643Z",
"dateReserved": "2025-09-21T08:16:05.733Z",
"dateUpdated": "2025-09-22T17:24:16.558Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}