GitHub Actions Ends Node 20 Support and Updates Runner Requirements

On September 23, GitHub officially ended support for Node 20 in its GitHub Actions runners, transitioning JavaScript action execution to Node 24. A significant change is the removal of the ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION environment variable, which previously allowed for the temporary use of the outdated Node.js version. Furthermore, as of September 29, mandatory version checks for self-hosted runners were implemented for GitHub Enterprise Cloud users. These updates are aimed at improving the security and relevance of CI/CD infrastructure, though they may cause disruptions in existing workflows that rely on older Node versions. Developers are advised to promptly check their configurations and update actions to ensure compatibility with the current runtime environment. These changes highlight GitHub's push toward mandatory adoption of modern development standards, requiring teams to pay closer attention to the maintenance of their automated pipelines.