{"id":"CVE-2026-66877","published":"2026-10-14T15:17:21.863","lastModified":"2026-10-15T04:18:25.113","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.","cvssScore":8.1,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","cwes":["CWE-284"],"vendors":[],"products":[],"references":[{"url":"https://blog.gitea.com/release-of-1.27.3/","tags":[]},{"url":"https://github.com/go-gitea/gitea/pull/39005","tags":[]},{"url":"https://github.com/go-gitea/gitea/pull/39018","tags":[]},{"url":"https://github.com/go-gitea/gitea/releases/tag/v1.27.3","tags":[]},{"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-v2w8-m4gr-qj65","tags":[]}],"exploitRefs":[{"url":"https://github.com/go-gitea/gitea/pull/39005","tags":[]},{"url":"https://github.com/go-gitea/gitea/pull/39018","tags":[]},{"url":"https://github.com/go-gitea/gitea/releases/tag/v1.27.3","tags":[]},{"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-v2w8-m4gr-qj65","tags":[]}],"hasPoc":true,"ai":null}