{"id":"CVE-2026-33866","aliases":["GHSA-46r5-x6jq-v8g6","BIT-mlflow-2026-33866","PYSEC-2026-94"],"title":"MLflow is vulnerable to an authorization bypass affecting the AJAX endpoint","summary":"MLflow is vulnerable to an authorization bypass affecting the AJAX endpoint","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","vendor":"mlflow","product":"mlflow","ecosystem":"pip","affected":["mlflow < 3.11.0rc0"],"patched":["mlflow 3.11.0rc0"],"published":"2026-04-07","updated":"2026-09-10","sourceUpdated":"2026-09-10T03:50:42.818312809Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-46r5-x6jq-v8g6","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33866"},{"url":"https://github.com/mlflow/mlflow/pull/21708"},{"url":"https://github.com/mlflow/mlflow/commit/005b959cacda05d1423356cfcbd9ebeda8ff96a7"},{"url":"https://afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectors"},{"url":"https://cert.pl/en/posts/2026/04/CVE-2026-33865"},{"url":"https://github.com/mlflow/mlflow"},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/mlflow/PYSEC-2026-94.yaml"}],"tags":["osv","pip"],"epss":0.00362,"epssPercentile":0.29982,"ingestedAt":"2026-09-12T03:13:01.650Z","slug":"CVE-2026-33866","body":"## Overview\n\nMLflow 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\n\n## Affected packages\n\n- `mlflow < 3.11.0rc0`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `mlflow 3.11.0rc0`","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}