It's limited to ghs_ (server to server token's), that have the new format enabled: https://github.blog/changelog/2026-04-24-notice-about-upcoming-new-format-fo

It's limited to ghs_ (server to server token's), that have the new format enabled: https://github.blog/changelog/2026-04-24-notice-about-upcoming-new-format-for-github-app-installation-tokens/ https://github.blog/changelog/2026-04-24-notice-about-upcomi... (and actions that use the vulnerable package) This include's the GITHUB_TOKEN that is builtin within a actions jobs.