CVE-2026-33865

UNKNOWN 0.0

Stored XSS via unsafe YAML parsing in MLflow

CVSS Score

0.0

EPSS Score

0.1%

EPSS Percentile

18th

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

CWE	CWE-79
Vendor	mlflow
Product	mlflow
Published	Apr 7, 2026
Last Updated	Apr 14, 2026

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Affected Versions

Mlflow / Mlflow

0 ≤ 3.10.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/mlflow/mlflow/pull/21435 cert.pl: https://cert.pl/en/posts/2026/04/CVE-2026-33865/ afine.com: https://afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectors

Credits

Sławomir Zakrzewski (AFINE)