Bug 2438198 (CVE-2026-25598)

Summary: CVE-2026-25598 harden-runner: Harden-Runner: Outbound network connections can evade audit logging via specific socket system calls.
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: alcohan, cmyers, dnakabaa, gparvin, jbalunas, kaycoth, lcouzens, pahickey, rhaigner
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Harden-Runner, a CI/CD security agent. This vulnerability allows outbound network connections to evade audit logging. A remote attacker could exploit this by using specific socket system calls (sendto, sendmsg, and sendmmsg) to bypass detection and logging when the egress-policy: audit is enabled. This could lead to unauthorized information disclosure or a bypass of security monitoring.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-02-09 20:01:32 UTC 
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.