CVE-2026-66877

Gitea enforces first-time fork contributor approval by blocking jobs, but some job transition and dispatch paths do not re-check the run's approval requirement. A separate run sharing a job-level concurrency group can cancel a pending job and cause its blocked sibling jobs to be re-emitted and...

CVE-2026-66877 Gitea fork workflow approval bypass through concurrency cancellation

Gitea enforces first-time fork contributor approval by blocking jobs, but some job transition and dispatch paths do not re-check the run's approval requirement. A separate run sharing a job-level concurrency group can cancel a pending job and cause its blocked sibling jobs to be re-emitted and...

CVE-2026-66877

Gitea is vulnerable to a workflow approval bypass where first-time fork contributor jobs can be executed without maintainer approval. The root cause is that certain job transition and dispatch paths fail to re-verify approval requirements when a separate, legitimate run sharing a job-level concur...