Vulnerability · Published Dec 17, 2025 · Assigned by GitHub_M
CVE-2025-68144mcp-server-git argument injection in git_diff and git_checkout functions allows overwriting local files
Medium 6.3
In plain English
A medium-severity argument injection in servers from modelcontextprotocol. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 7.2% (higher than 94% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
In mcp-server-git versions prior to 2025.12.17, 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 2025.12.17 resolve this issue when it is released.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | mcp-server-git | 2025.12.18 | GHSA-9xwc-hfwc-8w59 |
| PyPI | mcp-server-git | 2025.12.18 | PYSEC-2026-1622 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| modelcontextprotocol | servers | < 2025.12.17 |
Weakness: CWE-88 · 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