{"id":"CVE-2026-104626","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-104626","generatedAt":"2026-10-28T01:03:28.973Z","title":"If a maintainer later approves the run, Gitea passed the already-cancelled job back through concurrency preparation, set it to waiting, and made it claimable by a matching runner, executing fork-controlled workflow code.","description":"A user who can open a fork pull request can place workflow content with a shared run-level concurrency group into a Gitea Actions run that is awaiting approval. When a later run in that group cancels the blocked job, the run becomes terminal while still marked as needing approval. If a maintainer later approves the run, Gitea passed the already-cancelled job back through concurrency preparation, set it to waiting, and made it claimable by a matching runner, executing fork-controlled workflow code. Exploitation requires the maintainer's later approval action, Actions to be enabled, and a runner that accepts the repository's jobs.","published":"2026-10-06T20:17:15.000Z","lastModified":"2026-10-13T17:24:53.000Z","status":"Analyzed","sourceIdentifier":"88ee5874-cf24-4952-aea0-31affedb7ff2","cvss":{"version":"3.1","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-841"],"affected":["gitea/gitea"],"epss":{"score":0.00333,"percentile":0.2628,"date":"2026-10-26","history":[{"date":"2026-10-07","score":0.00156,"percentile":0.04182}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.33%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-10-07T22:30:11.000Z","detail":{"from":null,"score":"8.8","severity":"HIGH","fromSeverity":null},"summary":"Now scored CVSS 8.8 HIGH."},{"kind":"new","label":"New CVE","at":"2026-10-06T20:17:15.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-10-06T20:17:15.120Z"},"summary":"New CVE, high severity (CVSS 8.8)."}],"references":[{"url":"https://blog.gitea.com/release-of-28.0.0/","tags":["Release Notes"],"source":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/pull/39399","tags":["Patch"],"source":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/releases/tag/v28.0.0","tags":["Release Notes"],"source":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-93pj-3x56-5gc2","tags":["Mitigation","Vendor Advisory"],"source":"88ee5874-cf24-4952-aea0-31affedb7ff2"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-104626","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}