Vulnerability · CVE-2025-32955
Harden-Runner is a CI/CD security agent that works like an EDR for GitHub Actions runners.
Published Apr 21, 2025 · catalog updated Apr 22, 2025 · Harden-Runner is a CI/CD
Check if you run it
No confirmed exploitation is on record for CVE-2025-32955. EPSS is 0.23%. Act only if a listed version of Harden-Runner is a CI/CD is installed.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (Harden-Runner is a CI/CD).
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- Medium6.0
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.23%
- Remediation
- Version ranges on file
- Affected products
- vendor step-security harden-runner 0.12.0, < 2.12.0
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 bypass. Harden-Runner includes a policy option 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
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor step-security harden-runner 0.12.0, < 2.12.00.12.0, < 2.12.0
How to fix CVE-2025-32955
Recommended remediation
Affected version ranges suggest a fixed boundary. Verify against the vendor advisory for your release.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2025-32955. EPSS is 0.23%. Act only if a listed version of Harden-Runner is a CI/CD is installed.
Which versions are affected?
Compare what you have installed with step-security harden-runner 0.12.0, < 2.12.0 0.12.0, < 2.12.0. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.23%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Apr 21, 2025 · EUVD
Detected
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 bypass. Harden-Runner includes a policy option 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
Apr 22, 2025 · EUVD
Updated
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 bypass. Harden-Runner includes a policy option 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
Sources
- CVE.orgVulnerability recordCVE-2025-32955
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2025-32955
30-day exploitation probability 0.2%
first.org - EUVDVulnerability recordEUVD-2025-12339
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 bypass. Harden-Runner includes a policy option to prevent the GitHub Actions runner user from using sudo. This is implemented by remo
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.