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CVE PROGRAM SOURCE RECORD8.1 High

CVE-2026-66877

Gitea fork workflow approval bypass through concurrency cancellation

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Gitea Gitea

Default version status: unaffected

  • 0 to ≤ 1.27.2affected

References