{"id":"BIT-mlflow-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","aliases":["CVE-2026-33866","GHSA-46r5-x6jq-v8g6","PYSEC-2026-94"],"modified":"2026-09-08T08:48:13.637081529Z","published":"2026-04-21T12:08:47.512Z","database_specific":{"severity":"Medium","cpes":["cpe:2.3:a:lfprojects:mlflow:*:*:*:*:*:*:*:*"]},"references":[{"type":"ADVISORY","url":"https://afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectors"},{"type":"ADVISORY","url":"https://cert.pl/en/posts/2026/04/CVE-2026-33865/"},{"type":"FIX","url":"https://github.com/mlflow/mlflow/pull/21708"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33866"}],"affected":[{"package":{"name":"mlflow","ecosystem":"Bitnami","purl":"pkg:bitnami/mlflow"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.11.1"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/mlflow/BIT-mlflow-2026-33866.json"},"severity":[{"type":"CVSS_V4","score":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}],"schema_version":"1.9.0"}