Vulnerability Description
Harden-Runner is a CI/CD security agent that works like an EDR for GitHub Actions runners. Prior to 2.14.2, a security vulnerability has been identified in the Harden-Runner GitHub Action (Community Tier) that allows outbound network connections to evade audit logging. Specifically, outbound traffic using the sendto, sendmsg, and sendmmsg socket system calls can bypass detection and logging when using egress-policy: audit. This vulnerability is fixed in 2.14.2.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Stepsecurity | Harden-Runner | < 2.14.2 |
Related Weaknesses (CWE)
References
- https://github.com/step-security/harden-runner/releases/tag/v2.14.2Release Notes
- https://github.com/step-security/harden-runner/security/advisories/GHSA-cpmj-h4fVendor Advisory
FAQ
What is CVE-2026-25598?
CVE-2026-25598 is a vulnerability with a CVSS score of 5.3 (MEDIUM). Harden-Runner is a CI/CD security agent that works like an EDR for GitHub Actions runners. Prior to 2.14.2, a security vulnerability has been identified in the Harden-Runner GitHub Action (Community T...
How severe is CVE-2026-25598?
CVE-2026-25598 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-25598?
Check the references section above for vendor advisories and patch information. Affected products include: Stepsecurity Harden-Runner.