CVE-2026-118237 (GCVE-0-2026-118237)
Vulnerability from cvelistv5
Published
2026-11-03 22:51
Modified
2026-11-03 22:51
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-125 - Out-of-bounds Read
Summary
An out-of-bounds read vulnerability was identified in GitHub Enterprise Server in the Git service (babeld). When proving possession of a host key, babeld's SSH implementation sized the session identifier by the current digest length rather than its own. An attacker with an account and SSH access could re-key to an algorithm with a longer hash, causing adjacent process memory to be signed and returned to the client, where a limited amount of it may be recoverable. This vulnerability affected all releases prior to 3.23 and was fixed in versions 3.22.3, 3.21.8, 3.20.10, and 3.19.14. This vulnerability was reported via the GitHub Bug Bounty program.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| GitHub | Enterprise Server |
Version: 3.19.0 ≤ Version: 3.20.0 ≤ Version: 3.21.0 ≤ Version: 3.22.0 ≤ |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"product": "Enterprise Server",
"vendor": "GitHub",
"versions": [
{
"changes": [
{
"at": "3.19.14",
"status": "unaffected"
}
],
"lessThan": "3.19.*",
"status": "affected",
"version": "3.19.0",
"versionType": "semver"
},
{
"changes": [
{
"at": "3.20.10",
"status": "unaffected"
}
],
"lessThan": "3.20.*",
"status": "affected",
"version": "3.20.0",
"versionType": "semver"
},
{
"changes": [
{
"at": "3.21.8",
"status": "unaffected"
}
],
"lessThan": "3.21.*",
"status": "affected",
"version": "3.21.0",
"versionType": "semver"
},
{
"changes": [
{
"at": "3.22.3",
"status": "unaffected"
}
],
"lessThan": "3.22.*",
"status": "affected",
"version": "3.22.0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "R31n"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "An out-of-bounds read vulnerability was identified in GitHub Enterprise Server in the Git service (babeld). When proving possession of a host key, babeld\u0027s SSH implementation sized the session identifier by the current digest length rather than its own. An attacker with an account and SSH access could re-key to an algorithm with a longer hash, causing adjacent process memory to be signed and returned to the client, where a limited amount of it may be recoverable. This vulnerability affected all releases prior to 3.23 and was fixed in versions 3.22.3, 3.21.8, 3.20.10, and 3.19.14. This vulnerability was reported via the GitHub Bug Bounty program.\u003cbr\u003e\u003cbr\u003e"
}
],
"value": "An out-of-bounds read vulnerability was identified in GitHub Enterprise Server in the Git service (babeld). When proving possession of a host key, babeld\u0027s SSH implementation sized the session identifier by the current digest length rather than its own. An attacker with an account and SSH access could re-key to an algorithm with a longer hash, causing adjacent process memory to be signed and returned to the client, where a limited amount of it may be recoverable. This vulnerability affected all releases prior to 3.23 and was fixed in versions 3.22.3, 3.21.8, 3.20.10, and 3.19.14. This vulnerability was reported via the GitHub Bug Bounty program."
}
],
"impacts": [
{
"capecId": "CAPEC-540",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-540 Overread Buffers"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "LOW",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-125",
"description": "CWE-125 Out-of-bounds Read",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-11-03T22:51:42.155Z",
"orgId": "82327ea3-741d-41e4-88f8-2cf9e791e760",
"shortName": "GitHub_P"
},
"references": [
{
"tags": [
"release-notes"
],
"url": "https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.14"
},
{
"tags": [
"release-notes"
],
"url": "https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.10"
},
{
"tags": [
"release-notes"
],
"url": "https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.8"
},
{
"tags": [
"release-notes"
],
"url": "https://docs.github.com/en/enterprise-server@3.22/admin/release-notes#3.22.3"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Out-of-bounds read vulnerability in GitHub Enterprise Server allowed disclosure of process memory in the Git service",
"x_generator": {
"engine": "Vulnogram 0.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "82327ea3-741d-41e4-88f8-2cf9e791e760",
"assignerShortName": "GitHub_P",
"cveId": "CVE-2026-118237",
"datePublished": "2026-11-03T22:51:42.155Z",
"dateReserved": "2026-10-27T19:28:49.006Z",
"dateUpdated": "2026-11-03T22:51:42.155Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…