mcp-server-git has missing path validation when using --repository flag
In mcp-server-git versions prior to 2025.12.18, when the server is started with the --repository flag to restrict operations to a specific repository path, it did not validate that repo_path arguments in subsequent tool calls were actually within that configured path. This could allow tool calls to operate on other repositories accessible to the server process. The fix adds path validation that resolves both the configured repository and the requested path (following symlinks) and verifies the requested path is within the allowed repository before executing any git operations. Users are advised to upgrade to 2025.12.18 to remediate this issue.
Thank you to https://hackerone.com/yardenporat for reporting.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | mcp-server-git | < 2025.12.18 | 2025.12.18 |
References
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N- Weakness (CWE)
CWE-22- Platform
- Python (PyPI)
- Package
mcp-server-git- Disclosed
- 17.12.2025
- Updated
- 11.10.2026 13:19
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-1623 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-j22h-9j4x-23w5 - CC BY 4.0
Vulnerability history: mcp-server-git
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 4
- First → latest
- 12.2025 02.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Medium 4
Disclosures per year
- 2025: 3
- 2026: 1
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