CVE-2025-32955 Information

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.

Reference

https://github.com/step-security/harden-runner/commit/0634a2670c59f64b4a01f0f96f84700a4088b9f0 https://github.com/step-security/harden-runner/releases/tag/v2.12.0 https://github.com/step-security/harden-runner/security/advisories/GHSA-mxr3-8whj-j74r