Medium severity5.3NVD Advisory· Published Feb 9, 2026· Updated Jun 17, 2026
CVE-2026-25598
CVE-2026-25598
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
step-security/harden-runnerGitHub Actions | < 2.14.2 | 2.14.2 |
Affected products
3cpe:2.3:a:stepsecurity:harden-runner:*:*:*:*:community:*:*:*+ 1 more
- cpe:2.3:a:stepsecurity:harden-runner:*:*:*:*:community:*:*:*range: <2.14.2
- (no CPE)range: < 2.14.2
Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-cpmj-h4f6-r6pqghsaADVISORY
- github.com/step-security/harden-runner/security/advisories/GHSA-cpmj-h4f6-r6pqnvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-25598ghsaADVISORY
- github.com/step-security/harden-runner/commit/5ef0c079ce82195b2a36a210272d6b661572d83eghsaWEB
- github.com/step-security/harden-runner/releases/tag/v2.14.2nvdRelease NotesWEB
News mentions
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