{"api_version":"1","generated_at":"2026-11-13T12:44:00+00:00","cve":"CVE-2026-100408","urls":{"html":"https://cve.report/CVE-2026-100408","api":"https://cve.report/api/cve/CVE-2026-100408.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-100408","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-100408"},"summary":{"title":"Git for Windows: git-credential-wincred Erase Path Heap Overflow","description":"Git for Windows is the Windows port of Git. From 2.43.0.windows.1 until 2.55.0.windows.3, when a matching git:* credential exists in Windows Credential Manager and a git-credential-wincred erase input includes a password field, the operation in contrib/credential/wincred/git-credential-wincred.c allocates a buffer of exactly CredentialBlobSize bytes in match_cred_password() and then uses wcsncpy_s() to copy the corresponding number of wide characters plus a terminating NUL. The destination capacity is also supplied in bytes instead of WCHAR elements, allowing a fixed two-byte NUL write past the allocation before the password comparison determines whether CredDeleteW() should remove the credential; erase without a password field does not enter this comparison path. The helper can terminate with Windows heap-corruption status, and git credential reject can appear successful while the rejected credential remains stored. This issue is fixed in version 2.55.0.windows.3.","state":"PUBLISHED","assigner":"GitHub_M","published_at":"2026-11-04 15:17:21","updated_at":"2026-11-12 20:04:52"},"problem_types":["CWE-787","CWE-787 CWE-787: Out-of-bounds Write"],"metrics":[{"version":"3.1","source":"security-advisories@github.com","type":"Secondary","score":"4.4","severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L","baseScore":4.4,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"LOW"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"4.4","severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L","data":{"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":[{"url":"https://github.com/git-for-windows/git/releases/tag/v2.55.0.windows.3","name":"https://github.com/git-for-windows/git/releases/tag/v2.55.0.windows.3","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/git-for-windows/git/commit/b4d1fb62c7e2fdcab5a018e25e51acb196eb1756","name":"https://github.com/git-for-windows/git/commit/b4d1fb62c7e2fdcab5a018e25e51acb196eb1756","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/git-for-windows/git/security/advisories/GHSA-5j7x-r6vf-jhq2","name":"https://github.com/git-for-windows/git/security/advisories/GHSA-5j7x-r6vf-jhq2","refsource":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-100408","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100408","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"git-for-windows","product":"git","version":"affected >= 2.43.0.windows.1, < 2.55.0.windows.3","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"100408","cve":"CVE-2026-100408","epss":"0.001170000","percentile":"0.016670000","score_date":"2026-11-12","updated_at":"2026-11-13 00:14:35"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-100408","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-11-09T16:20:25.703182Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-11-09T16:21:10.425Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"references":[{"tags":["exploit"],"url":"https://github.com/git-for-windows/git/security/advisories/GHSA-5j7x-r6vf-jhq2"}],"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"product":"git","vendor":"git-for-windows","versions":[{"status":"affected","version":">= 2.43.0.windows.1, < 2.55.0.windows.3"}]}],"descriptions":[{"lang":"en","value":"Git for Windows is the Windows port of Git. From 2.43.0.windows.1 until 2.55.0.windows.3, when a matching git:* credential exists in Windows Credential Manager and a git-credential-wincred erase input includes a password field, the operation in contrib/credential/wincred/git-credential-wincred.c allocates a buffer of exactly CredentialBlobSize bytes in match_cred_password() and then uses wcsncpy_s() to copy the corresponding number of wide characters plus a terminating NUL. The destination capacity is also supplied in bytes instead of WCHAR elements, allowing a fixed two-byte NUL write past the allocation before the password comparison determines whether CredDeleteW() should remove the credential; erase without a password field does not enter this comparison path. The helper can terminate with Windows heap-corruption status, and git credential reject can appear successful while the rejected credential remains stored. This issue is fixed in version 2.55.0.windows.3."}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-787","description":"CWE-787: Out-of-bounds Write","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-11-04T15:12:10.794Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"references":[{"name":"https://github.com/git-for-windows/git/security/advisories/GHSA-5j7x-r6vf-jhq2","tags":["x_refsource_CONFIRM"],"url":"https://github.com/git-for-windows/git/security/advisories/GHSA-5j7x-r6vf-jhq2"},{"name":"https://github.com/git-for-windows/git/commit/b4d1fb62c7e2fdcab5a018e25e51acb196eb1756","tags":["x_refsource_MISC"],"url":"https://github.com/git-for-windows/git/commit/b4d1fb62c7e2fdcab5a018e25e51acb196eb1756"},{"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"}],"source":{"advisory":"GHSA-5j7x-r6vf-jhq2","discovery":"UNKNOWN"},"title":"Git for Windows: git-credential-wincred Erase Path Heap Overflow"}},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2026-100408","datePublished":"2026-11-04T15:12:10.794Z","dateReserved":"2026-09-25T20:08:33.084Z","dateUpdated":"2026-11-09T16:21:10.425Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-11-04 15:17:21","lastModifiedDate":"2026-11-12 20:04:52","problem_types":["CWE-787","CWE-787 CWE-787: Out-of-bounds Write"],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L","baseScore":4.4,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"LOW"},"exploitabilityScore":1.8,"impactScore":2.5}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-11-09T16:20:25.703182Z","id":"CVE-2026-100408","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"100408","Ordinal":"1","Title":"Git for Windows: git-credential-wincred Erase Path Heap Overflow","CVE":"CVE-2026-100408","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"100408","Ordinal":"1","NoteData":"Git for Windows is the Windows port of Git. From 2.43.0.windows.1 until 2.55.0.windows.3, when a matching git:* credential exists in Windows Credential Manager and a git-credential-wincred erase input includes a password field, the operation in contrib/credential/wincred/git-credential-wincred.c allocates a buffer of exactly CredentialBlobSize bytes in match_cred_password() and then uses wcsncpy_s() to copy the corresponding number of wide characters plus a terminating NUL. The destination capacity is also supplied in bytes instead of WCHAR elements, allowing a fixed two-byte NUL write past the allocation before the password comparison determines whether CredDeleteW() should remove the credential; erase without a password field does not enter this comparison path. The helper can terminate with Windows heap-corruption status, and git credential reject can appear successful while the rejected credential remains stored. This issue is fixed in version 2.55.0.windows.3.","Type":"Description","Title":"Git for Windows: git-credential-wincred Erase Path Heap Overflow"}]}}}