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CVE-2025-32955

6.0 · MEDIUM

Harden-Runner is a CI/CD security agent that works like an EDR for GitHub Actions runners.

Published Apr 21, 2025CWE-268EPSS 0.23%

Overview

CVE-2025-32955 is a medium-severity vulnerability. It was published on April 21, 2025 and has a CVSS 3.1 base score of 6.0 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.0, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/step-security/harden-runner/commit/0634a2670c59f64b4a01f0f96f84700a4088b9f0GitHubgithub.com/step-security/harden-runner/releases/tag/v2.12.0GitHubgithub.com/step-security/harden-runner/security/advisories/GHSA-mxr3-8whj-j74r

How CyberStrike helps

Frequently asked questions

What is CVE-2025-32955?

CVE-2025-32955 is a medium-severity vulnerability. It was published on April 21, 2025 and has a CVSS 3.1 base score of 6.0 (MEDIUM).

How severe is CVE-2025-32955?

This vulnerability has a CVSS 3.1 base score of 6.0, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-32955?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-32955?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-32955 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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