Incorrect behavior order in GitHub Copilot CLI - CVE-2026-45033
Published: July 28, 2026
Vulnerability identifier: #VU139894
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-45033
CWE-ID: CWE-696
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: GitHub
Affected software:
GitHub Copilot CLI
GitHub Copilot CLI
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary commands.
The vulnerability exists due to incorrect behavior order in git operations when processing a project directory containing a nested bare git repository with executable configuration keys. A remote attacker can place a malicious bare repository inside a project to execute arbitrary commands.
User interaction is required in that GitHub Copilot CLI must perform git operations in or near the malicious directory.
How to mitigate CVE-2026-45033
Install security update from vendor's website.