{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-100407", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-09-25T20:08:33.084Z", "datePublished": "2026-11-04T15:07:59.401Z", "dateUpdated": "2026-11-04T15:07:59.401Z"}, "containers": {"cna": {"title": "Git for Windows: git-credential-wincred OAuth Store Heap Overflow", "problemTypes": [{"descriptions": [{"cweId": "CWE-787", "lang": "en", "description": "CWE-787: Out-of-bounds Write", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 4.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/git-for-windows/git/security/advisories/GHSA-v3h4-vrpr-rh9x", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/git-for-windows/git/security/advisories/GHSA-v3h4-vrpr-rh9x"}, {"name": "https://github.com/git-for-windows/git/commit/52ca1113d651127f89477a8763f86ab20f645e1d", "tags": ["x_refsource_MISC"], "url": "https://github.com/git-for-windows/git/commit/52ca1113d651127f89477a8763f86ab20f645e1d"}, {"name": "https://github.com/git-for-windows/git/releases/tag/v2.55.0.windows.3", "tags": ["x_refsource_MISC"], "url": "https://github.com/git-for-windows/git/releases/tag/v2.55.0.windows.3"}], "affected": [{"vendor": "git-for-windows", "product": "git", "versions": [{"version": ">= 2.44.0.windows.1, < 2.55.0.windows.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-11-04T15:07:59.401Z"}, "descriptions": [{"lang": "en", "value": "Git for Windows is the Windows port of Git. From 2.44.0.windows.1 until 2.55.0.windows.3, the git-credential-wincred store operation in contrib/credential/wincred/git-credential-wincred.c uses _scwprintf() to size a formatted wide-character credential buffer without space for the terminating NUL when both password and oauth_refresh_token are present. The operation also passes a byte count to _snwprintf_s() where a wide-character count is required, allowing the terminator to be written one WCHAR past the heap allocation before CredWriteW() persists the credential. The resulting fixed two-byte NUL overwrite can terminate the helper with Windows heap-corruption status and can cause git credential approve to report success even though the OAuth credential was not stored. This issue is fixed in version 2.55.0.windows.3."}], "source": {"advisory": "GHSA-v3h4-vrpr-rh9x", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "git", "vendor": "git-for-windows", "versions": [{"status": "affected", "version": ">= 2.44.0.windows.1, < 2.55.0.windows.3"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Git for Windows is the Windows port of Git. From 2.44.0.windows.1 until 2.55.0.windows.3, the git-credential-wincred store operation in contrib/credential/wincred/git-credential-wincred.c uses _scwprintf() to size a formatted wide-character credential buffer without space for the terminating NUL when both password and oauth_refresh_token are present. The operation also passes a byte count to _snwprintf_s() where a wide-character count is required, allowing the terminator to be written one WCHAR past the heap allocation before CredWriteW() persists the credential. The resulting fixed two-byte NUL overwrite can terminate the helper with Windows heap-corruption status and can cause git credential approve to report success even though the OAuth credential was not stored. This issue is fixed in version 2.55.0.windows.3."}], "id": "CVE-2026-100407", "lastModified": "2026-11-04T15:17:21.797", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 4.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 2.5, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-11-04T15:17:21.797", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/git-for-windows/git/commit/52ca1113d651127f89477a8763f86ab20f645e1d"}, {"source": "security-advisories@github.com", "url": "https://github.com/git-for-windows/git/releases/tag/v2.55.0.windows.3"}, {"source": "security-advisories@github.com", "url": "https://github.com/git-for-windows/git/security/advisories/GHSA-v3h4-vrpr-rh9x"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"created": "2026-11-04T16:30:13.004601+00:00", "updated": "2026-11-04T16:30:13.004616+00:00", "vendors": []}