Update step-security/harden-runner action to v2.21.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
step-security/harden-runner	action	minor	v2.20.0 → v2.21.0

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Release Notes

step-security/harden-runner (step-security/harden-runner)

v2.21.0

Compare Source

What's Changed

• Support for denied endpoints in block mode. This is included in the enterprise tier. Customers can deny outbound calls, for example, to public package registries.
• Improved Support for AWS CodeBuild GitHub Actions Runners.
• Bug fixes.

Full Changelog: step-security/harden-runner@v2.20.1...v2.21.0

v2.20.1

Compare Source

What's Changed

• AWS CodeBuild-hosted runner support
• Implicitly allow single-labeled (internal) domains in block-mode

Full Changelog: step-security/harden-runner@v2.20.0...v2.20.1

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DeepSource Code Review

We reviewed changes in 1274960...8cffe00 on this pull request. Below is the summary for the review, and you can see the individual issues we found as inline review comments.

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PR Report Card

Overall Grade

Security   Reliability   Complexity   Hygiene

Code Review Summary

Analyzer	Status	Updated (UTC)	Details
PHP		Aug 17, 2026 12:07a.m.	Review ↗

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