CVE-2026-25598
MEDIUMCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
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2Tags
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.
Analysis
Harden-Runner versions prior to 2.14.2 fail to log outbound network connections made through sendto, sendmsg, and sendmmsg socket calls when audit mode is enabled, allowing attackers to exfiltrate data from GitHub Actions runners without detection. This integrity bypass affects users relying on Harden-Runner's egress policy auditing for security monitoring. …
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.
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