{"cve":"CVE-2026-33866","nvd":{"published":"2026-04-07T13:16:47.000","modified":"2026-06-17T10:38:13.670","status":"Analyzed","description":"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","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","score":5.3},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","score":4.3},"cwes":["CWE-862"],"references":["https://afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectors","https://cert.pl/en/posts/2026/04/CVE-2026-33865/","https://github.com/mlflow/mlflow/pull/21708"],"products":["lfprojects:mlflow"],"source":"nvd","synced_at":"2026-10-19T22:28:59.047572785+00:00"},"epss":{"cve":"CVE-2026-33866","score":0.00362,"percentile":0.29981,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-46r5-x6jq-v8g6","url":"https://osv.dev/vulnerability/GHSA-46r5-x6jq-v8g6","summary":"MLflow is vulnerable to an authorization bypass affecting the AJAX endpoint","modified":"2026-09-10T03:50:42.818312809Z","packages":[{"ecosystem":"PyPI","name":"mlflow","purl":"pkg:pypi/mlflow","ranges":["<3.11.0rc0"],"fixed":["3.11.0rc0"]}]},{"id":"PYSEC-2026-94","url":"https://osv.dev/vulnerability/PYSEC-2026-94","summary":"","modified":"2026-06-10T17:02:20.749690187Z","packages":[{"ecosystem":"PyPI","name":"mlflow","purl":"pkg:pypi/mlflow","ranges":["<3.11.0rc0"],"fixed":["3.11.0rc0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}