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cicd-security

Harden GitHub Actions, GitLab CI, and similar pipelines against supply-chain attacks, secret exfiltration, and pwn-request abuse. Use when authoring or reviewing workflow files, adding a third-party action, image, or script, wiring cloud or registry credentials into CI, or triaging a suspected pipeline compromise.

skills/cicd-security/SKILL.md

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Aug 14, 2026
License
MIT

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# CI/CD Pipeline Security

## Rules (for AI agents)

### ALWAYS
- Pin every third-party GitHub Action by **commit SHA** (full 40-char), never by
  a floating tag (`@v1`, `@main`, `@latest`) — tags can be re-pushed. The
  tj-actions/changed-files March 2025 incident exfiltrated secrets from 23,000+
  repositories specifically because consumers used floating tags. Same applies to
  GitLab CI `include:` references and reusable workflows. Renovate / Dependabot
  can keep the SHA pins fresh.
  <!-- pattern: { id: gha-pin-actions-by-sha, severity: high, check: deterministic } -->
- Declare `permissions:` at the workflow or job level and default to
[Credential-related source omitted]