ZDF
Sign inSign up

Vulnerabilities

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

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.

  1. 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

  2. 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.