GitHub Updates actions/checkout to Block Common Pwn Request Attack Patterns
GitHub has updated 'actions/checkout' to block pwn request attacks exploiting 'pull_request_target' workflows. This change aims to secure the software supply chain by preventing malicious code execution with elevated privileges.
This update mitigates a critical attack vector in CI/CD pipelines. Organizations should audit workflows for 'pull_request_target' usage and transition to safer triggers or the updated 'actions/checkout' version promptly.
GitHub's 'actions/checkout' now includes safeguards against pwn request attacks targeting 'pull_request_target' workflows. These attacks leverage elevated privileges to execute malicious code during pull requests.
The update, effective June 18, 2026, enhances supply chain security by limiting risky behavior in CI/CD pipelines. Developers are urged to adopt the latest version to protect their workflows.
Organizations should review existing workflows to identify unsafe triggers and adopt secure practices, such as using the updated 'actions/checkout' or alternative configurations to minimize exposure.