Sourced from step-security/harden-runner's releases.

v2.12.1

What's Changed

• Detection capabilities have been upgraded to better recognize attempts at runner tampering. These improvements are informed by real-world incident learnings, including analysis of anomalous behaviors observed in the tj-actions and reviewdog supply chain attack.
• Resolved an issue where the block policy was not enforced correctly when the GitHub Actions job was running inside a container on a self-hosted VM runner.

Full Changelog: https://github.com/step-security/harden-runner/compare/v2...v2.12.1

v2.12.0

What's Changed

1. A new option, disable-sudo-and-containers, is now available to replace the disable-sudo policy, addressing Docker-based privilege escalation (CVE-2025-32955). More details can be found in this blog post.

2. New detections have been added based on insights from the tj-actions and reviewdog actions incidents.

Full Changelog: https://github.com/step-security/harden-runner/compare/v2...v2.12.0

• 002fdce Merge pull request #544 from step-security/rc-21
• 2489e3f Merge branch 'main' into rc-21
• 75dd441 Merge pull request #555 from step-security/dependabot/github_actions/step-sec...
• 4381ace Bump step-security/publish-unit-test-result-action from 2.19.0 to 2.20.0
• a9da90b Merge pull request #553 from h0x0er/feat/container-workflows
• a60ef21 update
• 4ad512f Merge branch 'rc-21' into feat/container-workflows
• 6b41a39 fixed test case
• fa70c45 update agent
• eb47845 self-hosted: refactored block-policy apply logic
• Additional commits viewable in compare view

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