GitHub Advisoryadvisory · PyPI

GHSA-9xwc-hfwc-8w59 mcp-server-git argument injection in git_diff and git_checkout functions allows overwriting local files

MEDIUM Published 2025-12-17 Modified 2025-12-20 Official page ↗
Aliases
CVE-2025-68144
Ecosystem
PyPI
Packages
mcp-server-git
Severity
Moderate
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:H/SA:L
Weaknesses
CWE-88
Reviewed
2025-12-17

Affected packages

• PyPI mcp-server-git: < 2025.12.18 → fixed in 2025.12.18

Description

In mcp-server-git versions prior to 2025.12.18, the git_diff and git_checkout functions passed user-controlled arguments directly to git CLI commands without sanitization. Flag-like values (e.g., `--output=/path/to/file` for `git_diff`) would be interpreted as command-line options rather than git refs, enabling arbitrary file overwrites. The fix adds validation that rejects arguments starting with - and verifies the argument resolves to a valid git ref via rev_parse before execution. Users are advised to update to 2025.12.18 resolve this issue. Thank you to https://hackerone.com/yardenporat for reporting.

Related

Alias · CVE (1)

  • CVE-2025-68144 In mcp-server-git versions prior to 2025.12.17, the git_diff and git_checkout functions passed user-controlled arguments directly to git… vulnerability

Weakness · CWE (1)

  • CWE-88 Improper Neutralization of Argument Delimiters in a Command weakness

References