Harden-Runner
Actively maintainedstep-security/harden-runner · Apache-2.0
Harden-Runner is a CI/CD security agent that works like an EDR for GitHub Actions runners. It monitors network egress, file integrity, and process activity on those runners, detecting threats in real-time.
Security signals
- CVE-2026-32947moderate
Egress Policy Bypass via DNS over HTTPS (DoH) in Harden-Runner (Community Tier)
Published Mar 17, 2026 - CVE-2026-25598moderate
Harden-Runner: Bypassing Logging of Outbound Connections Using sendto, sendmsg, and sendmmsg in Harden-Runner (Community Tier)
Published Feb 9, 2026 - CVE-2026-32946moderate
Egress Policy Bypass via DNS over TCP in Harden-Runner (Community Tier)
Published Mar 17, 2026 - CVE-2024-52587low
Harden-Runner has a command injection weaknesses in `setup.ts` and `arc-runner.ts`
Published Nov 18, 2024 - CVE-2025-32955moderate
Harden-Runner allows evasion of 'disable-sudo' policy
Published Apr 22, 2025
How to use it safely
uses: step-security/harden-runner@e14015d583714f6e62063499dc959a02595150a1 # v2.21.1Mutable tags like v2.21.1 can be rewritten to point at malicious commits. Pinning to the full commit SHA is the only reference GitHub guarantees immutable.
Full workflow example
steps: - uses: step-security/harden-runner@e14015d583714f6e62063499dc959a02595150a1 # v2.21.1
Score breakdown
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