{"id":"CVE-2026-33866","aliases":["BIT-mlflow-2026-33866","GHSA-46r5-x6jq-v8g6","PYSEC-2026-94"],"url":"https://o3.security/vulnerability/CVE-2026-33866","summary":"Authorization Bypass in MLflow AJAX Endpoint","details":"MLflow is vulnerable to an authorization bypass affecting the AJAX endpoint used to download saved model artifacts. Due to missing access‑control validation, a user without permissions to a given experiment can directly query this endpoint and retrieve model artifacts they are not authorized to access.\n\n \nThis issue affects MLflow version through 3.10.1","published":"2026-04-07T12:57:44.380Z","modified":"2026-08-12T03:51:29.775392495Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"mlflow","fixedVersion":"3.11.0rc0"}],"fix":{"url":"https://github.com/mlflow/mlflow/pull/21708","label":"mlflow/mlflow#21708"},"references":[{"type":"WEB","url":"https://github.com/"},{"type":"WEB","url":"https://github.com/mlflow/"},{"type":"ADVISORY","url":"https://cert.pl/en/posts/2026/04/CVE-2026-33865/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33866.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33866"},{"type":"FIX","url":"https://github.com/mlflow/mlflow/pull/21708"},{"type":"EVIDENCE","url":"https://afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectors"},{"type":"WEB","url":"https://github.com/mlflow/mlflow/commit/005b959cacda05d1423356cfcbd9ebeda8ff96a7"},{"type":"WEB","url":"https://cert.pl/en/posts/2026/04/CVE-2026-33865"},{"type":"PACKAGE","url":"https://github.com/mlflow/mlflow"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/mlflow/PYSEC-2026-94.yaml"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:29.775392495Z"}}