CVE-2025-66413: Git for Windows leaks NTLM hash when cloning from an attacker-controlled server

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-03-10 · updated 2026-06-17
Weakness: CWE-200

Description

Git for Windows is the Windows port of Git. Prior to 2.53.0(2), it is possible to obtain a user's NTLM hash by tricking them into cloning from a malicious server. Since NTLM hashing is weak, it is possible for the attacker to brute-force the user's account name and password. This vulnerability is fixed in 2.53.0(2).

Affected products

Gitforwindows Git: through 2.53.0

References

https://github.com/git-for-windows/git/releases/tag/v2.53.0.windows.2
https://github.com/git-for-windows/git/security/advisories/GHSA-hv9c-4jm9-jh3x

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