GitHub Actions Enhances Security with 'actions/checkout' v7 Update
In June 2026, GitHub enhanced the security of its software supply chain by updating the 'actions/checkout' action to block common 'pwn request' attack patterns. These attacks exploit the 'pull_request_target' workflow trigger to execute malicious code with full workflow privileges. Effective June 18, 2026, 'actions/checkout' version 7 and later versions refuse to fetch fork pull request code in 'pull_request_target' and 'workflow_run' workflows by default, unless explicitly configured otherwise. This change aims to prevent unauthorized code execution and protect repositories from potential compromises. This update is particularly relevant now due to the increasing prevalence of supply chain attacks targeting CI/CD pipelines. By enforcing stricter defaults, GitHub addresses a critical vulnerability that has been exploited in recent incidents, thereby strengthening the overall security posture of the developer community.
Kill Chain