{"id":"BIT-gitea-2026-103670","summary":"Gitea trusted workflow cancellation by unapproved fork runs","details":"When a Gitea Actions run was inserted, older runs in the same workflow-level concurrency group were cancelled without checking whether the new run still needed approval. Because fork pull request runs are inserted under the base repository, a user who can open a pull request from a fork could cancel trusted in-progress runs that share a concurrency group with `cancel-in-progress` enabled, without approval and without running any code. On self-hosted runners this can interrupt deployments and leave partial state behind.","aliases":["CVE-2026-103670","GHSA-4j4g-m7mr-hp5j"],"modified":"2026-10-16T09:55:37.323286125Z","published":"2026-10-16T08:36:31.082Z","database_specific":{"cpes":["cpe:2.3:a:gitea:gitea:*:*:*:*:*:*:*:*"],"severity":"High"},"references":[{"type":"ARTICLE","url":"https://blog.gitea.com/release-of-28.0.0/"},{"type":"FIX","url":"https://github.com/go-gitea/gitea/pull/39399"},{"type":"ARTICLE","url":"https://github.com/go-gitea/gitea/releases/tag/v28.0.0"},{"type":"ADVISORY","url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-4j4g-m7mr-hp5j"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-103670"}],"affected":[{"package":{"name":"gitea","ecosystem":"Bitnami","purl":"pkg:bitnami/gitea"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"28.0.0"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/gitea/BIT-gitea-2026-103670.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"}]}],"schema_version":"1.9.0"}