Git for Windows: `git clone` from manipulated repositories can leak NTLM hashes to arbitrary servers
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-200.
Summary
Git for Windows is the Windows port of Git. Versions prior to 2.53.0.windows.3 do not have protections that prevent attackers from obtaining a user's NTLM hash. The NTLM hash can be obtained by tricking users into cloning a malicious repository, or checking out a malicious branch, that accesses an attacker-controlled server. By default, NTLM authentication does not need any user interaction. By brute-forcing the NTLMv2 hash (which is expensive, but possible), credentials can be extracted. This issue has been fixed in version 2.53.0.windows.3.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| git-for-windows | git | before 2.53.0.windows.3 | 2.53.0.windows.3 | Patch available | CNA |
- git Vendorgit-for-windows Affected before 2.53.0.windows.3 Fixed in 2.53.0.windows.3 Patch available CNA
Remediation
- Fix · CNA git (git-for-windows) Fixed in 2.53.0.windows.3
Timeline
- 2026-10-02 Threatist record created from CVE-2026-32631
References
Other 5
- https://github.com/git-for-windows/git/security/advisories/GHSA-9j5h-h4m7-85hx
- https://github.com/git-for-windows/git/releases/tag/v2.53.0.windows.3
- https://learn.microsoft.com/en-au/windows/whats-new/deprecated-features#:~:text=NTLM
- https://support.microsoft.com/en-us/topic/upcoming-changes-to-ntlmv1-in-windows-11-version-24h2-and-windows-server-2025-c0554217-cdbc-420f-b47c-e02b2db49b2e
- https://techcommunity.microsoft.com/blog/windows-itpro-blog/the-evolution-of-windows-authentication/3926848
More git-for-windows vulnerabilities
- TI-2026-44986 Git for Windows: Server-advertised bundle-uri can trigger outbound SMB callbacks via UNC and file:// paths on Windows CVSS 3.1HIGH 7.4
- TI-2025-40849 Git for Windows leaks NTLM hash when cloning from an attacker-controlled server CVSS 3.1HIGH 7.4
- TI-2018-07996 In Git before 2.13.7, 2.14.x before 2.14.4, 2.15.x before 2.15.2, 2.16.x before 2.16.4… CVSS 3.0HIGH 7.8
- TI-2026-85080 Out-of-bounds write in Git for Windows credential helper CVSS 3.1MEDIUM 4.4
- TI-2022-20294 Git clone remote code execution vulnerability in git-for-windows CVSS 3.1HIGH 8.6
- TI-2023-09447 gitk can inadvertently call executables in the worktree CVSS 3.1HIGH 8.6
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences