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    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 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.

    Published:Feb 9, 2026
    Last Modified:Apr 18, 2026
    EPS:Feb 9, 2026
    EPSS Score:0.00019
    CVSS Score:5.3

    Affected Products

    Vendor
    Step Security
    Product
    Harden Runner
    Vendor
    Stepsecurity
    Product
    Harden-runner

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-778 Insufficient Logging

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High