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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Github | Copilot-Cli | < 1.0.43 |
Related Weaknesses (CWE)
References
- https://github.com/github/copilot-cli/security/advisories/GHSA-9ccr-r5hg-74gfExploitMitigationVendor Advisory
- https://github.com/github/copilot-cli/security/advisories/GHSA-9ccr-r5hg-74gfExploitMitigationVendor Advisory
FAQ
What is CVE-2026-45033?
CVE-2026-45033 is a vulnerability with a CVSS score of 7.8 (HIGH). 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?
CVE-2026-45033 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-45033?
Check the references section above for vendor advisories and patch information. Affected products include: Github Copilot-Cli.