CVE-2026-33866
Authorization Bypass in MLflow AJAX Endpoint
- State
- Published
- Severity
- 5.3 Medium
- Published
- Apr 7, 2026
- Updated
- Apr 14, 2026
- Reserved
- Mar 24, 2026
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.
This issue affects MLflow version through 3.10.1
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | 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 | CERT-PL |
Weaknesses
- CWE-862 Missing Authorization
Affected Products
| Product | Versions |
|---|---|
MlflowMlflow |
|
References
- https://github.com/mlflow/mlflow/pull/21708patch
- https://cert.pl/en/posts/2026/04/CVE-2026-33865/third-party-advisory
- https://afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectorsexploittechnical-description
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.