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  4. CVE 2026 100407 git for windows git credential wincred oauth
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Back to active CVEs
Medium · CVSS 4.4CVE-2026-100407

Git for Windows: git-credential-wincred OAuth Store Heap OverflowCVE-2026-100407

Answer in brief

CVE-2026-100407 records a Medium severity (CVSS 4.4) vulnerability in Git for Windows: git-credential-wincred OAuth Store Heap Overflow. The current sources do not mark it as known exploited. The current feed maps git-for-windows/git (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 4, 2026Updated Nov 4, 2026Source checked Nov 4, 2026First seen by HOL Nov 4, 2026Material review Nov 4, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 4.4
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 4.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps git-for-windows/git (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
git-for-windows/gitgeneric>=2.44.0.windows.1 <2.55.0.windows.32.55.0.windows.3

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for git-for-windows/git.
  2. 2Review the reported fix. Update git-for-windows/git to 2.55.0.windows.3 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 4, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 4, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 4, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Git for Windows: git-credential-wincred Erase Path Heap OverflowSame git-for-windows/git package
  • FreeRDP before 3.32.2 Proxy Out-of-Bounds Write via Bitmap Cache v2 CapabilityAlso CWE-787
  • FreeRDP before 3.32.2 Heap Out-of-Bounds Write in Planar CodecAlso CWE-787
  • FreeRDP before 3.32.2 Heap Buffer Overflow via Early User Authorization ReadAlso CWE-787

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-787
Source
CVE List V5
Source checked
Nov 4, 2026
References
3 linked sources
Open source record