{"id":"CVE-2026-42844","aliases":["GHSA-6xx2-m8wv-756h"],"url":"https://o3.security/vulnerability/CVE-2026-42844","summary":"Grav: Low-privileged API users can create super-admin accounts via blueprint-upload","details":"Grav is a file-based Web platform. In Grav 2.0.0-beta.2, a low-privileged authenticated API user with api.media.write can abuse /api/v1/blueprint-upload to write an arbitrary YAML file into user/accounts/, then log in as the newly created account with api.super privileges. This results in full administrative compromise of the Grav API. This vulnerability is fixed in API 1.0.0-beta.17.","published":"2026-05-12T21:43:18.259Z","modified":"2026-08-07T11:30:59.592604007Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"getgrav/grav","fixedVersion":"2.0.0-beta.4"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42844.json"},{"type":"ADVISORY","url":"https://github.com/getgrav/grav/security/advisories/GHSA-6xx2-m8wv-756h"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42844"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:30:59.592604007Z"}}