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 s…
Published: 2026-10-14 · CVSS: 8.1 · CVSS 3.1
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 dispatched without approval. This allows unreviewed workflow code to execute on self-hosted runners; fork secrets remain withheld and the run token remains read-only.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7