Is there a public exploit for CVE-2026-100407?

No public exploit for CVE-2026-100407 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-100407?

CVE-2026-100407 scores CVSS 4.4 (v3.1), rated medium.

What does CVE-2026-100407 affect?

CVE-2026-100407 affects git-for-windows Git.

4.4 Medium

Git for Windows is the Windows port of Git.

CVE-2026-100407

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 oauthrefreshtoken are present. The operation also passes a byte count to snwprintfs() 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.

Assessment

CVSS: 4.4 (v3.1)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 4 November 2026
Last updated: 4 November 2026
Affected: git-for-windows · Git
Assigner: GitHub_M

CVSS vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

At the source

EUVD (ENISA)

References

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