Vulnerability in Step-security Harden-runner
CVE-2026-25598
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 conne…
EPSS: 0.003 (23.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Step-security Harden-runner — versions < 2.14.2
- Stepsecurity Harden-runner
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-25598?
- CVE-2026-25598 is a medium-severity vulnerability in Step-security Harden-runner, classified under CWE-778. CVSS score: 5.3/10. Published 2026-02-09.
- How severe is CVE-2026-25598?
- Medium severity. CVSS v3 base score is 5.3 out of 10.