{"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":"2026-11-05T19:07:18.059Z"},"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"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-11-04T20:41:14.929892Z","id":"CVE-2026-100407","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-11-05T19:07:18.059Z"}}]}}