Control GitHub Actions cache access with cache-mode
GitHub has introduced a new 'cache-mode' parameter for GitHub Actions workflows. This feature allows users to enforce least-privilege access controls on cache resources at the individual workflow or job level.
Verified State Diff
Impact & Verification Analysis
DevOps engineers, security teams, and developers managing CI/CD pipelines on GitHub.
It significantly improves the security posture of CI/CD pipelines by preventing unauthorized cache manipulation, which is a critical vector for build-time attacks.
Full Fact Overview
The introduction of 'cache-mode' addresses a significant security and architectural gap in GitHub Actions, where previously, cache access was broadly scoped. By allowing granular control over read and write permissions for the cache, organizations can prevent unauthorized workflows from accessing or overwriting sensitive build artifacts. This implementation aligns with the principle of least privilege, reducing the attack surface for supply chain vulnerabilities where a compromised workflow might otherwise attempt to poison or exfiltrate cached dependencies.