mcp-server-git argument injection in git_diff and git_checkout functions allows overwriting local files

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

6.3 · 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 · score source

EPSS

• CVE-2025-68144: 7.21% estimated exploitation activity in the next 30 days; percentile 94.32 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

In mcp-server-git versions prior to 2025.12.18, the gitdiff and gitcheckout functions passed user-controlled arguments directly to git CLI commands without sanitization. Flag-like values (e.g., --output=/path/to/file for gitdiff) 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 revparse before execution. Users are advised to update to 2025.12.18 resolve this issue. Thank you to https://hackerone.com/yardenporat for reporting.

Published by the source

17 Dec 2025, 22:50 UTC

Last modified by the source

7 Jul 2026, 17:56 UTC

Source last checked

26 Oct 2026, 13:36 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-9xwc-hfwc-8w59

2. Revision 2 · amended · 24 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-9xwc-hfwc-8w59

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# Patch Next advisory brief: CVE-2025-68144

Advisory: mcp-server-git argument injection in git_diff and git_checkout functions allows overwriting local files
IDs: CVE-2025-68144, GHSA-9xwc-hfwc-8w59
Record: https://patchnext.com/advisories/cve-2025-68144 (revision 3, source checked 26 Oct 2026, 13:36 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: mcp-server-git 2025.12.18. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI mcp-server-git: affected < 2025.12.18; fixed in 2025.12.18

## Suggested inspection (read-only)
- `python -m pip show mcp-server-git`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on mcp-server-git.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-9xwc-hfwc-8w59 (OSV record GHSA-9xwc-hfwc-8w59 lists affected ranges: PyPI mcp-server-git >=0 <2025.12.18 (fixed))
- Verified: https://github.com/advisories/GHSA-9xwc-hfwc-8w59 (GitHub-reviewed advisory GHSA-9xwc-hfwc-8w59 lists affected ranges: PyPI mcp-server-git >=0 <2025.12.18)

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