Vulnerability Description
GitHub Copilot CLI brings AI-powered coding assistance directly to your command line. Prior to 1.0.43, a security vulnerability has been identified in GitHub Copilot CLI where a malicious bare git repository nested inside a project directory can achieve arbitrary code execution when the agent performs git operations. By exploiting git's automatic bare repository discovery during directory traversal, an attacker can set core.fsmonitor or other executable config keys to run arbitrary commands without user awareness or approval. The vulnerability arises because git's core.fsmonitor config key (and 15+ similar keys such as core.hookspath, diff.external, merge.tool, etc.) can specify arbitrary shell commands that git will execute as part of normal operations like status, diff, or rev-parse. This vulnerability is fixed in 1.0.43.
Related Weaknesses (CWE)
References
- https://github.com/github/copilot-cli/security/advisories/GHSA-9ccr-r5hg-74gf
- https://github.com/github/copilot-cli/security/advisories/GHSA-9ccr-r5hg-74gf
FAQ
What is CVE-2026-45033?
CVE-2026-45033 is a documented vulnerability. GitHub Copilot CLI brings AI-powered coding assistance directly to your command line. Prior to 1.0.43, a security vulnerability has been identified in GitHub Copilot CLI where a malicious bare git re...
How severe is CVE-2026-45033?
CVSS scoring is not yet available for CVE-2026-45033. Check NVD for updates.
Is there a patch for CVE-2026-45033?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.