{"id":"CVE-2026-8147","aliases":["BIT-mlflow-2026-8147","GHSA-2cm6-r77w-6g96"],"url":"https://o3.security/vulnerability/CVE-2026-8147","summary":"Authorization Bypass in mlflow/mlflow","details":"In MLflow versions prior to 3.14.0, when running with authentication enabled, the trace API endpoints lack proper authorization validators. This allows any authenticated user to bypass experiment-level authorization controls on all trace operations, including reading, deleting, and modifying traces on experiments they do not have permission to access. The issue arises from the `_before_request` handler, which does not register authorization validators for trace endpoints, resulting in requests proceeding without validation. This vulnerability can expose sensitive data, destroy audit logs, and allow unauthorized modifications.","published":"2026-07-02T07:32:58.308Z","modified":"2026-08-13T18:50:54.161800781Z","cvss":{"score":8.1,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"},"epss":{"score":0.00376,"percentile":0.30701,"asOf":"2026-08-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"mlflow","fixedVersion":"3.13.0rc0"}],"fix":{"url":"https://github.com/mlflow/mlflow/commit/f9b1eb510478570609ef451984a255775aa4b937","label":"mlflow/mlflow@f9b1eb5"},"references":[{"type":"WEB","url":"https://huntr.com/bounties/b00c3ddd-373e-492f-9bf0-41a28bb21ed5"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8147.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-8147"},{"type":"FIX","url":"https://github.com/mlflow/mlflow/commit/f9b1eb510478570609ef451984a255775aa4b937"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-13T18:50:54.161800781Z"}}