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CVE-2026-66877

Gitea fork workflow approval bypass through concurrency cancellation PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
Gitea / Giteaaffected 0 through 1.27.2

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.