Read the docs
TI-2025-33100 Aliases CVE-2025-53107GHSA-3q26-f695-pp76

@cyanheads/git-mcp-server vulnerable to command injection in several tools

Priority HIGH 74CWE-77Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
High
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-77.

Summary

@cyanheads/git-mcp-server is an MCP server designed to interact with Git repositories. Prior to version 2.1.5, there is a command injection vulnerability caused by the unsanitized use of input parameters within a call to child_process.exec, enabling an attacker to inject arbitrary system commands. Successful exploitation can lead to remote code execution under the server process's privileges. The server constructs and executes shell commands using unvalidated user input directly within command-line strings. This introduces the possibility of shell metacharacter injection (|, >, &&, etc.). An MCP Client can be instructed to execute additional actions for example via indirect prompt injection when asked to read git logs. This issue has been patched in version 2.1.5.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.24536 97th percentileScored 2026-11-07
Fix Fixed git-mcp-server (cyanheads): 2.1.5@cyanheads/git-mcp-server (npm): 2.1.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
cyanheadsgit-mcp-serverbefore 2.1.52.1.5Patch availableCNA
—@cyanheads/git-mcp-server (npm)before 2.1.52.1.5Patch availableGHSA-3q26-f695-pp76
  • git-mcp-server Vendorcyanheads Affected before 2.1.5 Fixed in 2.1.5 Patch available CNA
  • @cyanheads/git-mcp-server (npm) Vendor— Affected before 2.1.5 Fixed in 2.1.5 Patch available GHSA-3q26-f695-pp76

Remediation

  • Fix · CNA git-mcp-server (cyanheads) Fixed in 2.1.5
  • Fix · GHSA-3q26-f695-pp76 @cyanheads/git-mcp-server (npm) Fixed in 2.1.5 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-53107
  2. 2026-10-03 Alias added: GHSA-3q26-f695-pp76

References

Advisory 1

Other 4

  • TI-2026-58751 git-mcp-server 2.15.1 Argument Injection via Git Ref Parameters CVSS 4.0HIGH 8.7

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences