Vulnerability 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
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Lfprojects | Mlflow | <= 3.10.1 |
Related Weaknesses (CWE)
References
- https://afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectorsExploitThird Party Advisory
- https://cert.pl/en/posts/2026/04/CVE-2026-33865/Third Party Advisory
- https://github.com/mlflow/mlflow/pull/21708Issue TrackingPatch
FAQ
What is CVE-2026-33866?
CVE-2026-33866 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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 expe...
How severe is CVE-2026-33866?
CVE-2026-33866 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33866?
Check the references section above for vendor advisories and patch information. Affected products include: Lfprojects Mlflow.