Vulnerability Description
Harden-Runner is a CI/CD security agent that works like an EDR for GitHub Actions runners. Versions from 0.12.0 to before 2.12.0 are vulnerable to `disable-sudo` bypass. Harden-Runner includes a policy option `disable-sudo` to prevent the GitHub Actions runner user from using sudo. This is implemented by removing the runner user from the sudoers file. However, this control can be bypassed as the runner user, being part of the docker group, can interact with the Docker daemon to launch privileged containers or access the host filesystem. This allows the attacker to regain root access or restore the sudoers file, effectively bypassing the restriction. This issue has been patched in version 2.12.0.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/step-security/harden-runner/commit/0634a2670c59f64b4a01f0f96f
- https://github.com/step-security/harden-runner/releases/tag/v2.12.0
- https://github.com/step-security/harden-runner/security/advisories/GHSA-mxr3-8wh
FAQ
What is CVE-2025-32955?
CVE-2025-32955 is a vulnerability with a CVSS score of 6.0 (MEDIUM). Harden-Runner is a CI/CD security agent that works like an EDR for GitHub Actions runners. Versions from 0.12.0 to before 2.12.0 are vulnerable to `disable-sudo` bypass. Harden-Runner includes a polic...
How severe is CVE-2025-32955?
CVE-2025-32955 has been rated MEDIUM with a CVSS base score of 6.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-32955?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.