CVE-2026-27735 PUBLISHED

mcp-server-git : Path traversal in git_add allows staging files outside repository boundaries

Assigner: GitHub_M
Reserved: 23.02.2026 Published: 25.02.2026 Updated: 25.02.2026

Model Context Protocol Servers is a collection of reference implementations for the model context protocol (MCP). In mcp-server-git versions prior to 2026.1.14, the git_add tool did not validate that file paths provided in the files argument were within the repository boundaries. Because the tool used GitPython's repo.index.add() rather than the Git CLI, relative paths containing ../ sequences that resolve outside the repository were accepted and staged into the Git index. Users are advised to upgrade to 2026.1.14 or newer to remediate this issue.

Metrics

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
CVSS Score: 6.4

Product Status

Vendor modelcontextprotocol
Product servers
Versions
  • Version < 2026.1.14 is affected

References

Problem Types

  • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') CWE