| Component | MLflow |
| Severity | medium (CVSS 4.3) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| Published (NVD) | 2026-04-07 |
| Last modified | 2026-06-17 |
| Affected versions | mlflow <= 3.10.1 |
| Fixed in | see the vendor advisory |
| Weakness | CWE-862 |
| CISA KEV | not listed |
NVD 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
What to do
- NVD lists no fixed version yet: follow the vendor advisory below and keep MLflow off the public internet until a fix ships.
- Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-33866
- https://github.com/mlflow/mlflow/pull/21708
- https://afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectors
- https://cert.pl/en/posts/2026/04/CVE-2026-33865/
Read more
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