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(CVE-2026-24051)
Vulnerability from cleanstart – Published: 2026-09-15 01:22 – Updated: 2026-09-18 11:59 – Source website
Withdrawn 2026-09-18
VLAI
Summary
gRPC-Go is the Go language implementation of gRPC
Details
Multiple security vulnerabilities affect the knative-serving package. gRPC-Go is the Go language implementation of gRPC. See references for individual vulnerability details.
Severity
9.8 (Critical)
References
{
"affected": [
{
"package": {
"ecosystem": "CleanStart",
"name": "knative-serving"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.22.1-r0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"credits": [],
"database_specific": {},
"details": "Multiple security vulnerabilities affect the knative-serving package. gRPC-Go is the Go language implementation of gRPC. See references for individual vulnerability details.",
"id": "CLEANSTART-2026-YX37957",
"modified": "2026-09-18T11:59:01.768079Z",
"published": "2026-09-15T01:22:12.875122Z",
"references": [
{
"type": "ADVISORY",
"url": "https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-YX37957.json"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-24051"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-29181"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-33186"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-33818"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-39821"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-39882"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-39883"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-46600"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-56852"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-56853"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-56854"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-56855"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-56858"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-56859"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-56860"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-56862"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-78662"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-84303"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-84304"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2026-84445"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-24051"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-29181"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33186"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33818"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39821"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39882"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39883"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46600"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56852"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56853"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56854"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56855"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56858"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56859"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56860"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56862"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-78662"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-84303"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-84304"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-84445"
}
],
"related": [],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "gRPC-Go is the Go language implementation of gRPC",
"upstream": [
"CVE-2026-24051",
"CVE-2026-29181",
"CVE-2026-33186",
"CVE-2026-33818",
"CVE-2026-39821",
"CVE-2026-39882",
"CVE-2026-39883",
"CVE-2026-46600",
"CVE-2026-56852",
"CVE-2026-56853",
"CVE-2026-56854",
"CVE-2026-56855",
"CVE-2026-56858",
"CVE-2026-56859",
"CVE-2026-56860",
"CVE-2026-56862",
"CVE-2026-78662",
"CVE-2026-84303",
"CVE-2026-84304",
"CVE-2026-84445"
],
"withdrawn": "2026-09-18T11:59:01.768079Z"
}
CVE-2026-56854 (GCVE-0-2026-56854)
Vulnerability from cvelistv5 – Published: 2026-08-28 15:14 – Updated: 2026-08-28 20:17
VLAI
EPSS
VEX
Title
Source-address critical option not enforced for non-public-key auth callbacks in golang.org/x/crypto/ssh
Summary
The source-address critical option in the Permissions returned by an authentication callback was only enforced for the PublicKeyCallback and VerifiedPublicKeyCallback paths, extending the fix for CVE-2026-46595. Permissions returned by the PasswordCallback, KeyboardInteractiveCallback, NoClientAuthCallback, and GSSAPIWithMICConfig.AllowLogin callbacks were not validated against the client's remote address, so a source-address restriction set by those callbacks was silently ignored. The check is now applied to the Permissions returned by any authentication callback.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 20:16 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh |
Affected:
0 , < 0.55.0
(semver)
|
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
},
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}
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"timestamp": "2026-08-28T20:16:07.248758Z",
"version": "2.0.3"
},
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}
}
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"description": "CWE-863 Incorrect Authorization",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-28T20:17:17.397Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"packageName": "golang.org/x/crypto/ssh",
"product": "golang.org/x/crypto/ssh",
"programRoutines": [
{
"name": "connection.serverAuthenticate"
},
{
"name": "NewServerConn"
}
],
"vendor": "golang.org/x/crypto",
"versions": [
{
"lessThan": "0.55.0",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Longwei Wang (@gn00295120)"
}
],
"descriptions": [
{
"lang": "en",
"value": "The source-address critical option in the Permissions returned by an authentication callback was only enforced for the PublicKeyCallback and VerifiedPublicKeyCallback paths, extending the fix for CVE-2026-46595. Permissions returned by the PasswordCallback, KeyboardInteractiveCallback, NoClientAuthCallback, and GSSAPIWithMICConfig.AllowLogin callbacks were not validated against the client\u0027s remote address, so a source-address restriction set by those callbacks was silently ignored. The check is now applied to the Permissions returned by any authentication callback."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "CWE-863: Incorrect Authorization",
"lang": "en"
}
]
}
],
"providerMetadata": {
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"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
"shortName": "Go"
},
"references": [
{
"url": "https://go.dev/issue/80213"
},
{
"url": "https://go.dev/cl/797040"
},
{
"url": "https://pkg.go.dev/vuln/GO-2026-6303"
}
],
"title": "Source-address critical option not enforced for non-public-key auth callbacks in golang.org/x/crypto/ssh"
}
},
"cveMetadata": {
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"assignerShortName": "Go",
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"datePublished": "2026-08-28T15:14:26.918Z",
"dateReserved": "2026-06-23T15:10:49.353Z",
"dateUpdated": "2026-08-28T20:17:17.397Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-56855 (GCVE-0-2026-56855)
Vulnerability from cvelistv5 – Published: 2026-09-02 19:37 – Updated: 2026-09-03 14:14
VLAI
EPSS
VEX
Title
Prevent DoS on deadlocked established channel in golang.org/x/crypto/ssh
Summary
Previously, after a channel has been established, a malicious peer could send crafted messages that would deadlock the entire connection. Now, we handle all RFC 4254 channel messages; global requests are handled explicitly. Then, treat all other messages as a protocol error and tear the connection down instead of buffering and blocking.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-03 14:13 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh |
Affected:
0 , < 0.56.0
(semver)
|
Credits
{
"containers": {
"adp": [
{
"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"
}
},
{
"other": {
"content": {
"id": "CVE-2026-56855",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-03T14:13:54.397574Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-770",
"description": "CWE-770 Allocation of Resources Without Limits or Throttling",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-03T14:14:40.169Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"packageName": "golang.org/x/crypto/ssh",
"product": "golang.org/x/crypto/ssh",
"programRoutines": [
{
"name": "channel.handlePacket"
},
{
"name": "Dial"
},
{
"name": "NewClientConn"
},
{
"name": "NewControlClientConn"
},
{
"name": "NewServerConn"
}
],
"vendor": "golang.org/x/crypto",
"versions": [
{
"lessThan": "0.56.0",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Will Mortensen"
}
],
"descriptions": [
{
"lang": "en",
"value": "Previously, after a channel has been established, a malicious peer could send crafted messages that would deadlock the entire connection. Now, we handle all RFC 4254 channel messages; global requests are handled explicitly. Then, treat all other messages as a protocol error and tear the connection down instead of buffering and blocking."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "CWE-770: Allocation of Resources Without Limits or Throttling",
"lang": "en"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-02T19:37:05.807Z",
"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
"shortName": "Go"
},
"references": [
{
"url": "https://go.dev/issue/81317"
},
{
"url": "https://go.dev/cl/826524"
},
{
"url": "https://groups.google.com/g/golang-announce/c/1y3fb2np35U"
},
{
"url": "https://pkg.go.dev/vuln/GO-2026-6355"
}
],
"title": "Prevent DoS on deadlocked established channel in golang.org/x/crypto/ssh"
}
},
"cveMetadata": {
"assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
"assignerShortName": "Go",
"cveId": "CVE-2026-56855",
"datePublished": "2026-09-02T19:37:05.807Z",
"dateReserved": "2026-06-23T15:10:49.353Z",
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"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-56858 (GCVE-0-2026-56858)
Vulnerability from cvelistv5 – Published: 2026-08-13 21:58 – Updated: 2026-08-14 15:32
VLAI
EPSS
VEX
Title
Fix Javascript regexp context tracking in html/template
Summary
Previously, pathological inputs could close an unescaped '/' early, allowing for attack-controlled data to inject arbitrary content, potentially leading to XSS.
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 15:31 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Go standard library | html/template |
Affected:
0 , < 1.25.13
(semver)
Affected: 1.26.0-0 , < 1.26.6 (semver) Affected: 1.27.0-0 , < 1.27.0-rc.3 (semver) |
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.1,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-56858",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-14T15:31:30.140536Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-14T15:32:29.852Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"packageName": "html/template",
"product": "html/template",
"programRoutines": [
{
"name": "tJS"
},
{
"name": "Template.Execute"
},
{
"name": "Template.ExecuteTemplate"
}
],
"vendor": "Go standard library",
"versions": [
{
"lessThan": "1.25.13",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"lessThan": "1.26.6",
"status": "affected",
"version": "1.26.0-0",
"versionType": "semver"
},
{
"lessThan": "1.27.0-rc.3",
"status": "affected",
"version": "1.27.0-0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Ali Sherif"
}
],
"descriptions": [
{
"lang": "en",
"value": "Previously, pathological inputs could close an unescaped \u0027/\u0027 early, allowing for attack-controlled data to inject arbitrary content, potentially leading to XSS."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-13T21:58:53.354Z",
"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
"shortName": "Go"
},
"references": [
{
"url": "https://go.dev/issue/80435"
},
{
"url": "https://go.dev/cl/807100"
},
{
"url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
},
{
"url": "https://pkg.go.dev/vuln/GO-2026-6091"
}
],
"title": "Fix Javascript regexp context tracking in html/template"
}
},
"cveMetadata": {
"assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
"assignerShortName": "Go",
"cveId": "CVE-2026-56858",
"datePublished": "2026-08-13T21:58:53.354Z",
"dateReserved": "2026-06-23T15:10:49.353Z",
"dateUpdated": "2026-08-14T15:32:29.852Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-56859 (GCVE-0-2026-56859)
Vulnerability from cvelistv5 – Published: 2026-08-13 21:58 – Updated: 2026-08-14 15:21
VLAI
EPSS
VEX
Title
Add recursion depth guard during decode in encoding/xml
Summary
Previously, DecodeElement would reset the depth counter causing it to never fire; this could lead to stack exhaustion.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 15:21 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Go standard library | encoding/xml |
Affected:
0 , < 1.25.13
(semver)
Affected: 1.26.0-0 , < 1.26.6 (semver) Affected: 1.27.0-0 , < 1.27.0-rc.3 (semver) |
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CVE-2026-56860 (GCVE-0-2026-56860)
Vulnerability from cvelistv5 – Published: 2026-08-13 21:58 – Updated: 2026-08-14 16:14
VLAI
EPSS
VEX
Title
Avoid quadratic complexity in resolvePath in net/url
Summary
Previously, resolving relative paths containing parent directory ('..') segments performed string conversions and buffer rewrites on each step, resulting in quadratic time complexity and high memory allocation overhead. Now, path resolution operates on a byte buffer using index-based backtracking for '..' segments, eliminating the quadratic time complexity and significantly reducing memory allocations.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 16:14 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Go standard library | net/url |
Affected:
0 , < 1.25.13
(semver)
Affected: 1.26.0-0 , < 1.26.6 (semver) Affected: 1.27.0-0 , < 1.27.0-rc.3 (semver) |
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CVE-2026-56862 (GCVE-0-2026-56862)
Vulnerability from cvelistv5 – Published: 2026-08-13 21:58 – Updated: 2026-08-14 15:29
VLAI
EPSS
VEX
Title
Limit handshake messages we are willing to accept post-handshake in crypto/tls
Summary
Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not. As a result, a malicious client can keep sending KeyUpdate messages to force the server to keep performing key derivation operations indefinitely.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 15:27 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Go standard library | crypto/tls |
Affected:
0 , < 1.25.13
(semver)
Affected: 1.26.0-0 , < 1.26.6 (semver) Affected: 1.27.0-0 , < 1.27.0-rc.3 (semver) |
Credits
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CVE-2026-78662 (GCVE-0-2026-78662)
Vulnerability from cvelistv5 – Published: 2026-09-02 19:37 – Updated: 2026-09-03 13:20
VLAI
EPSS
VEX
Title
Prevent DoS on deadlocked undecided channel in golang.org/x/crypto/ssh
Summary
Previously, a channel registered in the mux's chanList is not usable until it is established. A malicious peer was able flood the channel's incomingRequests, deadlocking the entire connection. Now, we add an atomic established state, set when a channel becomes usable. Until such a time, handlePacket drops every packet other than the open confirmation/failure, without blocking and without tearing down the connection.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-03 13:19 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh |
Affected:
0 , < 0.56.0
(semver)
|
Credits
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CVE-2026-84303 (GCVE-0-2026-84303)
Vulnerability from cvelistv5 – Published: 2026-09-01 18:14 – Updated: 2026-09-02 19:14
VLAI
EPSS
VEX
Title
gRPC-Go: xDS RBAC HTTP Filter bypass via mixed-case Header Matching and gRFC A41 validation evasion
Summary
gRPC-Go is the Go language implementation of gRPC. Prior to 1.83.1, the xDS RBAC HTTP filter in internal/xds/httpfilter/rbac/rbac.go does not lowercase header matcher names in normalizeHeaderMatcher even though incoming metadata keys are lowercase. A DENY policy using a mixed-case name such as X-Role or User-Agent therefore does not match and fails open, allowing requests that should be rejected. The same case mismatch permits :Scheme or Grpc-Status to evade gRFC A41 validation and prevents Host from being rewritten to :authority. This issue is fixed in version 1.83.1.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-02 19:14 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/grpc/grpc-go/security/advisori… | x_refsource_CONFIRM |
| https://github.com/grpc/grpc-go/pull/9332 | x_refsource_MISC |
| https://github.com/grpc/grpc-go/pull/9335 | x_refsource_MISC |
| https://github.com/grpc/grpc-go/commit/db9482836c… | x_refsource_MISC |
| https://github.com/grpc/grpc-go/commit/ebba6f3f1b… | x_refsource_MISC |
| https://github.com/grpc/grpc-go/releases/tag/v1.83.1 | x_refsource_MISC |
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"discovery": "UNKNOWN"
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CVE-2026-84304 (GCVE-0-2026-84304)
Vulnerability from cvelistv5 – Published: 2026-09-01 18:19 – Updated: 2026-09-01 19:24
VLAI
EPSS
VEX
Title
gRPC-Go: Heap Memory Exhaustion (OOM) via HTTP/2 DATA Frame Fragmentation
Summary
gRPC-Go is the Go language implementation of gRPC. Prior to 1.83.1, internal/transport/transport.go stores each fragmented HTTP/2 DATA frame as a separate recvMsg in recvBuffer, so millions of one-byte frames can consume disproportionate heap memory even when payload bytes remain within connection and stream flow-control windows. An unauthenticated remote attacker can use concurrent multiplexed streams to exhaust process memory and cause a runtime panic or out-of-memory termination. Receive-buffer compaction is enabled by default and can be controlled temporarily with GRPC_GO_EXPERIMENTAL_ENABLE_RECEIVE_BUFFER_COMPACTION. This issue is fixed in version 1.83.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 19:23 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/grpc/grpc-go/security/advisori… | x_refsource_CONFIRM |
| https://github.com/grpc/grpc-go/pull/9331 | x_refsource_MISC |
| https://github.com/grpc/grpc-go/pull/9333 | x_refsource_MISC |
| https://github.com/grpc/grpc-go/commit/7354d9c8de… | x_refsource_MISC |
| https://github.com/grpc/grpc-go/commit/8cfeca0e1e… | x_refsource_MISC |
| https://github.com/grpc/grpc-go/releases/tag/v1.83.1 | x_refsource_MISC |
{
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}
],
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"privilegesRequired": "NONE",
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"x_refsource_MISC"
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],
"source": {
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"discovery": "UNKNOWN"
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"title": "gRPC-Go: Heap Memory Exhaustion (OOM) via HTTP/2 DATA Frame Fragmentation"
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},
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CVE-2026-84445 (GCVE-0-2026-84445)
Vulnerability from cvelistv5 – Published: 2026-09-14 16:11 – Updated: 2026-09-14 16:36
VLAI
EPSS
VEX
Title
gRPC-Go: Denial of Service (DoS) via crash due to missing `:authority` and `Host` headers in the xDS servers
Summary
gRPC-Go is the Go language implementation of gRPC. Prior to 1.82.2 and 1.83.2, servers created with xds.NewGRPCServer() allow internal/transport/http2_server.go to accept an RPC containing neither the :authority header nor the Host header, while RouteAndProcess in internal/xds/server/routing.go assumes that an authority value exists and indexes the empty slice. A remote client that can complete transport connection establishment can trigger an index-out-of-bounds panic that is not recovered by the per-RPC goroutine and terminates the entire server process. In insecure or ordinary TLS deployments the request can be unauthenticated, while strict mTLS or ALTS deployments require valid transport credentials before the malformed RPC can reach the interceptor. This issue is fixed in versions 1.82.2 and 1.83.2.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-14 16:36 UTC
Assigner
References
10 references
| URL | Tags |
|---|---|
| https://github.com/grpc/grpc-go/security/advisori… | x_refsource_CONFIRM |
| https://github.com/grpc/grpc-go/issues/9354 | x_refsource_MISC |
| https://github.com/grpc/grpc-go/pull/9365 | x_refsource_MISC |
| https://github.com/grpc/grpc-go/pull/9366 | x_refsource_MISC |
| https://github.com/grpc/grpc-go/pull/9367 | x_refsource_MISC |
| https://github.com/grpc/grpc-go/commit/3822494d8e… | x_refsource_MISC |
| https://github.com/grpc/grpc-go/commit/8668b69c16… | x_refsource_MISC |
| https://github.com/grpc/grpc-go/commit/93e31b4854… | x_refsource_MISC |
| https://github.com/grpc/grpc-go/releases/tag/v1.82.2 | x_refsource_MISC |
| https://github.com/grpc/grpc-go/releases/tag/v1.83.2 | x_refsource_MISC |
Impacted products
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"description": "CWE-248: Uncaught Exception",
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Loading…
Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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