CVE-2026-25598

MEDIUM

5.3

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.

CVE Details

CVSS v3.1 Score5.3

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published2/9/2026

Last Modified2/28/2026

Sourcenvd

Honeypot Sightings0

Affected Products

stepsecurity:harden-runner

Weaknesses (CWE)

CWE-778

References

https://github.com/step-security/harden-runner/releases/tag/v2.14.2(security-advisories@github.com)

https://github.com/step-security/harden-runner/security/advisories/GHSA-cpmj-h4f6-r6pq(security-advisories@github.com)

IOC Correlations

No correlations recorded

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