| Component | MLflow |
| Severity | medium (CVSS 5.4) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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-79 |
| CISA KEV | not listed |
NVD description
MLflow is vulnerable to Stored Cross-Site Scripting (XSS) caused by unsafe parsing of YAML-based MLmodel artifacts in its web interface. An authenticated attacker can upload a malicious MLmodel file containing a payload that executes when another user views the artifact in the UI. This allows actions such as session hijacking or performing operations on behalf of the victim. 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-2026-33865
- https://github.com/mlflow/mlflow/pull/21435
- 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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