Common Weakness Enumeration
CWE-195
AllowedSigned to Unsigned Conversion Error
Abstraction: Variant · Status: Draft
The product uses a signed primitive and performs a cast to an unsigned primitive, which can produce an unexpected value if the value of the signed primitive can not be represented using an unsigned primitive.
52 vulnerabilities reference this CWE, most recent first.
CVE-2026-110735 (GCVE-0-2026-110735)
Vulnerability from cvelistv5 – Published: 2026-10-14 15:41 – Updated: 2026-10-15 00:27 Disputed
VLAI
EPSS
VEX
Summary
Godot Engine through 4.7.2 has a heap out-of-bounds write in the binary resource loader (core/io/resource_format_binary.cpp, ResourceLoaderBinary::get_unicode_string). A string length is read from the resource file into a signed 32-bit integer and compared against the destination buffer size with a signed comparison, which conditionally resizes the buffer. A negative length value skips the resize; the same value is then passed to the copy routine as an unsigned byte count, where it sign-extends to a huge value, copying file-controlled data far past the undersized heap allocation. The defect is reached when the product or an exported game loads a crafted binary resource file (.res). NOTE: the Supplier's position is that the research has identified "no security issues" because the required attacker access is outside of the current Godot Engine threat model.
Severity
CWE
- CWE-195 - Signed to Unsigned Conversion Error
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| godotengine | Godot Engine |
Affected:
1.0.0 , ≤ 4.7.2
(semver)
cpe:2.3:a:godotengine:godot_engine:*:*:*:*:*:*:*:* |
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CVE-2026-102639 (GCVE-0-2026-102639)
Vulnerability from cvelistv5 – Published: 2026-09-29 17:57 – Updated: 2026-10-02 12:19 X_Open Source
VLAI
EPSS
VEX
Title
MobilityDB through 1.3.0 Out-of-bounds Read DoS via WKB Deserialization
Summary
MobilityDB version 1.3.0 and earlier contains an out-of-bounds read vulnerability in the MEOS binary and library WKB deserialization logic that allows unprivileged database users to crash the PostgreSQL backend process by supplying a crafted WKB payload with a negative length field. The negative length value wraps to a large unsigned size_t due to missing signed validation, bypasses an overflow-unsafe pointer arithmetic bounds check in wkb_parse_state_check(), and causes memcpy() in text_from_wkb_state() to operate with a corrupted unbounded length, resulting in a remote denial-of-service condition affecting all sessions on the PostgreSQL instance.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-02 12:18 UTC
CWE
- CWE-195 - Signed to Unsigned Conversion Error
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/MobilityDB/MobilityDB/security… | vendor-advisorytechnical-description |
| https://github.com/MobilityDB/MobilityDB/releases… | patch |
| https://github.com/MobilityDB/MobilityDB/releases… | patch |
| https://www.vulncheck.com/advisories/mobilitydb-t… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MobilityDB | MobilityDB |
Affected:
1.1.0 , ≤ 1.1.2
(semver)
Affected: 1.2.0 , < 1.2.2 (semver) Affected: 1.3.0 , < 1.3.1 (semver) |
Date Public
2026-09-29 00:00
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CVE-2026-101937 (GCVE-0-2026-101937)
Vulnerability from cvelistv5 – Published: 2026-10-14 16:40 – Updated: 2026-10-14 20:15
VLAI
EPSS
VEX
Title
Junos OS: SRX Series: An attacker causes data-plane denial of service when chassis-cluster high availability is used
Summary
A Signed to Unsigned Conversion Error vulnerability in the srxpfe of Juniper Networks Junos OS on the SRX Series allows an adjacent attacker to cause a denial of service of the data plane via chassis-cluster fabric traffic.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-14 20:15 UTC
CWE
- CWE-195 - Signed to Unsigned Conversion Error
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://supportportal.juniper.net/JSA112186 | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
0 , < 23.2R2-S7.7
(custom)
Affected: 23.4 , < 23.4R2-S8.13 (custom) Affected: 24.2 , < 24.2R2-S5.5 (custom) Affected: 24.4 , < 24.4R2-S5 (custom) Affected: 25.2 , < 25.2R2-S2 (custom) Affected: 25.4 , < 25.4R1-S3 (custom) Affected: 26.2 , < 26.2R1-S2 (custom) |
Date Public
2026-10-14 16:00
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CVE-2026-85441 (GCVE-0-2026-85441)
Vulnerability from cvelistv5 – Published: 2026-09-03 22:38 – Updated: 2026-09-04 13:40
VLAI
EPSS
VEX
Title
MOOS core-moos through 10.4.0 MOOSDB Denial of Service via Negative Serialized String Length
Summary
MOOS core-moos through 10.4.0 fails to validate that serialized string lengths are non-negative in CMOOSMsg::operator>>. Unauthenticated attackers can send a crafted message with a negative length value to the MOOSDB port, causing an unhandled exception that terminates the database process.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-04 13:28 UTC
CWE
- CWE-195 - Signed to Unsigned Conversion Error
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/themoos/core-moos/pull/74 | issue-trackingpatch |
| https://github.com/themoos/core-moos/commit/04c92… | patch |
| https://github.com/themoos/core-moos | product |
| https://github.com/themoos/core-moos/blob/ec9c77c… | technical-description |
| https://www.vulncheck.com/advisories/moos-core-mo… | third-party-advisory |
Impacted products
Date Public
2026-09-01 00:00
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CVE-2026-77406 (GCVE-0-2026-77406)
Vulnerability from cvelistv5 – Published: 2026-09-16 14:37 – Updated: 2026-09-16 18:35
VLAI
EPSS
VEX
Title
RabbitMQ amqp091-go: Consumer Message Flooding via Signed-to-Unsigned Integer Casting in Qos Configuration
Summary
RabbitMQ amqp091-go is a Go AMQP 0.9.1 client. Prior to 1.13.0, Channel.Qos in channel.go accepts negative prefetchCount and prefetchSize integers and casts them directly to uint16 and uint32 fields in the basic.qos method because validateQos is absent. Values such as -1 therefore wrap to 65535 or 4294967295 instead of being rejected. An application that permits untrusted configuration of these Qos values can unintentionally request extremely large prefetch limits, allowing a broker to deliver enough queued messages to exhaust client memory and disrupt processing. This issue is fixed in version 1.13.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 18:18 UTC
CWE
- CWE-195 - Signed to Unsigned Conversion Error
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/rabbitmq/amqp091-go/security/a… | x_refsource_CONFIRM |
| https://github.com/rabbitmq/amqp091-go/pull/351 | x_refsource_MISC |
| https://github.com/rabbitmq/amqp091-go/commit/3b8… | x_refsource_MISC |
| https://github.com/rabbitmq/amqp091-go/releases/t… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| rabbitmq | amqp091-go |
Affected:
< 1.13.0
|
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CVE-2026-74221 (GCVE-0-2026-74221)
Vulnerability from cvelistv5 – Published: 2026-09-29 21:29 – Updated: 2026-09-30 13:47
VLAI
EPSS
VEX
Title
U-Boot before 2026.10-rc5 Buffer Overflow via NFS READLINK
Summary
U-Boot before 2026.10-rc5 contains a buffer overflow in nfs_readlink_reply() function in net/nfs-common.c when processing NFS server responses. A malicious NFS server can send crafted READLINK replies with negative or oversized symlink length values to corrupt memory and crash the bootloader.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 13:47 UTC
CWE
- CWE-195 - Signed to Unsigned Conversion Error
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/u-boot/u-boot/commit/1c0aff3a5… | patch |
| https://github.com/u-boot/u-boot/blob/v2026.07/ne… | technical-description |
| https://github.com/u-boot/u-boot | product |
| https://www.vulncheck.com/advisories/u-boot-befor… | third-party-advisory |
Impacted products
Date Public
2026-08-19 00:00
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CVE-2026-74220 (GCVE-0-2026-74220)
Vulnerability from cvelistv5 – Published: 2026-09-29 21:29 – Updated: 2026-09-30 14:04
VLAI
EPSS
VEX
Title
U-Boot before 2026.10-rc5 Buffer Overflow via NFS READ Reply
Summary
U-Boot before 2026.10-rc5 contains a buffer overflow in nfs_read_reply() function in net/nfs-common.c that allows attackers to corrupt memory by supplying crafted NFS READ reply lengths. A malicious NFS server can exploit signed integer handling to bypass length validation and write far past the destination buffer, crashing the bootloader or corrupting memory.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 14:04 UTC
CWE
- CWE-195 - Signed to Unsigned Conversion Error
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/u-boot/u-boot/commit/0bbf09859… | patch |
| https://github.com/u-boot/u-boot/blob/v2026.07/ne… | technical-description |
| https://github.com/u-boot/u-boot | product |
| https://www.vulncheck.com/advisories/u-boot-befor… | third-party-advisory |
Impacted products
Date Public
2026-08-19 00:00
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CVE-2026-62959 (GCVE-0-2026-62959)
Vulnerability from cvelistv5 – Published: 2026-07-31 19:57 – Updated: 2026-07-31 23:34
VLAI
EPSS
VEX
Title
Coturn: Pre-authentication heap memory disclosure in ACME redirect (`try_acme_redirect`)
Summary
Coturn is a free open source implementation of TURN and STUN Server. From 4.5.2 through 4.14.0, when Coturn is started with --acme-redirect <URL> and exposes a plaintext-TCP listener, an unauthenticated remote client can send a single ordinary HTTP GET request and receive a 301 response whose Location header contains up to ~870 bytes of adjacent process heap memory. The leaked region is a recycled network receive buffer that is reused without being zeroed, so on a busy server it can contain data from other clients' requests (TURN credentials, OAuth tokens, relayed payloads). Root cause is a signed→unsigned conversion. This issue is fixed in version 4.15.0.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-31 23:34 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/coturn/coturn/security/advisor… | x_refsource_CONFIRM |
| https://github.com/coturn/coturn/pull/1965 | x_refsource_MISC |
| https://github.com/coturn/coturn/commit/960835886… | x_refsource_MISC |
| https://github.com/coturn/coturn/releases/tag/4.15.0 | x_refsource_MISC |
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CVE-2026-55991 (GCVE-0-2026-55991)
Vulnerability from cvelistv5 – Published: 2026-07-22 13:10 – Updated: 2026-09-16 14:24
VLAI
EPSS
VEX
Title
Remote DNS-over-QUIC (DoQ) flow-control assertion failure in libngtcp2
Summary
In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, a remote unauthenticated client can trigger a libngtcp2 assertion (if compiled with assertions on) and terminate the entire Unbound process using a single DNS-over-QUIC (DoQ) connection and one normal DNS query. This is caused by an erroneous error value passed to libngtcp2. When 'ngtcp2_conn_writev_stream()' returns 'NGTCP2_ERR_STREAM_DATA_BLOCKED', Unbound continues to call 'ngtcp2_ccerr_set_application_error()' with a '-1' error value. The 'int' literal '-1' is implicitly converted to the function's 'uint64_t error_code' parameter as '0xFFFFFFFFFFFFFFFF'. The follow-on 'ngtcp2_conn_write_connection_close()' serialises that value as a QUIC variable-length integer; because '2^64-1' exceeds the 62-bit varint ceiling, 'ngtcp2_put_uvarintlen()' fails 'assert(n < 4611686018427387904ULL)' and the whole resolver process aborts. A remote, unauthenticated DoQ client can trigger this deterministically with a single QUIC connection by advertising 'initial_max_stream_data_bidi_local = 1' in its transport parameters and sending one DoQ query without ever reading the stream.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-22 14:01 UTC
CWE
- CWE-195 - Signed to Unsigned Conversion Error
Assigner
NLnet Labs
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://www.nlnetlabs.nl/downloads/unbound/CVE-20… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| NLnet Labs | Unbound |
Affected:
1.22.0 , < 1.25.2
(semver)
|
Date Public
2026-07-22 00:00
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CVE-2026-55737 (GCVE-0-2026-55737)
Vulnerability from cvelistv5 – Published: 2026-07-27 15:13 – Updated: 2026-07-28 09:55
VLAI
EPSS
VEX
Title
Heap pointer corruption via signed/unsigned mismatch in LARGE_TUPLE_EXT decoding in erts external term format decoder
Summary
Signed to Unsigned Conversion Error and Out-of-bounds Write vulnerability in Erlang OTP erts allows an attacker who can supply a crafted Erlang external term format (ETF) binary to binary_to_term/1 to corrupt the BEAM heap pointer and crash the virtual machine.
When decoding a LARGE_TUPLE_EXT term, the validation pass decoded_size() in erts/emulator/beam/external.c reads the 32-bit arity field as unsigned (get_uint32()), while the decode pass dec_term() reads the same field as a signed 32-bit integer (get_int32()) into an int. An arity wire value of 0x80000000 passes validation as 2147483648 but decodes as -2147483648, so the subsequent hp += n moves the heap allocation pointer backward. Neither pass enforces the runtime tuple-arity limit MAX_ARITYVAL. The result is an out-of-bounds heap write; in practice the VM detects an impossible heap size and aborts, denying service. The required padding is large when uncompressed but the compressed-ETF envelope shrinks it to a small payload on the wire.
This issue affects OTP from OTP 25.0 before OTP 29.0.4, OTP 28.5.0.4 and OTP 27.3.4.15, corresponding to erts from 13.0 before 17.0.4, 16.4.0.4 and 15.2.7.11.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-27 18:34 UTC
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/erlang/otp/security/advisories… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-55737.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-55737 | related |
| https://www.erlang.org/doc/system/versions.html#o… | x_version-scheme |
| https://github.com/erlang/otp/commit/c5210b42a9d3… | patch |
Impacted products
2 products
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}
],
"negate": false,
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],
"operator": "AND"
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"credits": [
{
"lang": "en",
"type": "finder",
"value": "Nick Gunn"
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{
"lang": "en",
"type": "remediation developer",
"value": "Kiko Fernandez-Reyes"
},
{
"lang": "en",
"type": "remediation reviewer",
"value": "Sverker Eriksson"
}
],
"descriptions": [
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"value": "\u003cp\u003eSigned to Unsigned Conversion Error and Out-of-bounds Write vulnerability in Erlang OTP \u003ctt\u003eerts\u003c/tt\u003e allows an attacker who can supply a crafted Erlang external term format (ETF) binary to \u003ctt\u003ebinary_to_term/1\u003c/tt\u003e to corrupt the BEAM heap pointer and crash the virtual machine.\u003c/p\u003e\u003cp\u003eWhen decoding a \u003ctt\u003eLARGE_TUPLE_EXT\u003c/tt\u003e term, the validation pass \u003ctt\u003edecoded_size()\u003c/tt\u003e in \u003ctt\u003eerts/emulator/beam/external.c\u003c/tt\u003e reads the 32-bit arity field as unsigned (\u003ctt\u003eget_uint32()\u003c/tt\u003e), while the decode pass \u003ctt\u003edec_term()\u003c/tt\u003e reads the same field as a signed 32-bit integer (\u003ctt\u003eget_int32()\u003c/tt\u003e) into an \u003ctt\u003eint\u003c/tt\u003e. An arity wire value of \u003ctt\u003e0x80000000\u003c/tt\u003e passes validation as 2147483648 but decodes as -2147483648, so the subsequent \u003ctt\u003ehp += n\u003c/tt\u003e moves the heap allocation pointer backward. Neither pass enforces the runtime tuple-arity limit \u003ctt\u003eMAX_ARITYVAL\u003c/tt\u003e. The result is an out-of-bounds heap write; in practice the VM detects an impossible heap size and aborts, denying service. The required padding is large when uncompressed but the compressed-ETF envelope shrinks it to a small payload on the wire.\u003c/p\u003e\u003cp\u003eThis issue affects OTP from OTP 25.0 before OTP\u0026nbsp;29.0.4, OTP\u0026nbsp;28.5.0.4 and OTP\u0026nbsp;27.3.4.15, corresponding to \u003ctt\u003eerts\u003c/tt\u003e from 13.0 before 17.0.4, 16.4.0.4 and 15.2.7.11.\u003c/p\u003e"
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"value": "Signed to Unsigned Conversion Error and Out-of-bounds Write vulnerability in Erlang OTP erts allows an attacker who can supply a crafted Erlang external term format (ETF) binary to binary_to_term/1 to corrupt the BEAM heap pointer and crash the virtual machine.\n\nWhen decoding a LARGE_TUPLE_EXT term, the validation pass decoded_size() in erts/emulator/beam/external.c reads the 32-bit arity field as unsigned (get_uint32()), while the decode pass dec_term() reads the same field as a signed 32-bit integer (get_int32()) into an int. An arity wire value of 0x80000000 passes validation as 2147483648 but decodes as -2147483648, so the subsequent hp += n moves the heap allocation pointer backward. Neither pass enforces the runtime tuple-arity limit MAX_ARITYVAL. The result is an out-of-bounds heap write; in practice the VM detects an impossible heap size and aborts, denying service. The required padding is large when uncompressed but the compressed-ETF envelope shrinks it to a small payload on the wire.\n\nThis issue affects OTP from OTP 25.0 before OTP\u00a029.0.4, OTP\u00a028.5.0.4 and OTP\u00a027.3.4.15, corresponding to erts from 13.0 before 17.0.4, 16.4.0.4 and 15.2.7.11."
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"impacts": [
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"capecId": "CAPEC-92",
"descriptions": [
{
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"value": "CAPEC-92 Forced Integer Overflow"
}
]
}
],
"metrics": [
{
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"attackRequirements": "NONE",
"attackVector": "LOCAL",
"baseScore": 5.1,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
"version": "4.0",
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"format": "CVSS",
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"cweId": "CWE-195",
"description": "CWE-195 Signed to Unsigned Conversion Error",
"lang": "en",
"type": "CWE"
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{
"cweId": "CWE-787",
"description": "CWE-787 Out-of-bounds Write",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-28T09:55:26.434Z",
"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"shortName": "EEF"
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"references": [
{
"tags": [
"vendor-advisory",
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"url": "https://github.com/erlang/otp/security/advisories/GHSA-446w-268v-9462"
},
{
"tags": [
"related"
],
"url": "https://cna.erlef.org/cves/CVE-2026-55737.html"
},
{
"tags": [
"related"
],
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-55737"
},
{
"tags": [
"x_version-scheme"
],
"url": "https://www.erlang.org/doc/system/versions.html#order-of-versions"
},
{
"tags": [
"patch"
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"url": "https://github.com/erlang/otp/commit/c5210b42a9d3d96f3d25601942ce8122be0f3761"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Heap pointer corruption via signed/unsigned mismatch in LARGE_TUPLE_EXT decoding in erts external term format decoder",
"x_generator": {
"engine": "cvelib 1.8.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"assignerShortName": "EEF",
"cveId": "CVE-2026-55737",
"datePublished": "2026-07-27T15:13:54.699Z",
"dateReserved": "2026-06-17T10:44:34.365Z",
"dateUpdated": "2026-07-28T09:55:26.434Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.