MEDIUM5.4

PYSEC-2026-93

Quick fix

PYSEC-2026-93 — mlflow: upgrade to the fixed version with the command below.

pip install --upgrade 'mlflow>=3.11.0rc0'

Details

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

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/mlflow

Introduced in: 0Fixed in: 3.11.0rc0

Fixpip install --upgrade 'mlflow>=3.11.0rc0'

References

https://cert.pl/en/posts/2026/04/CVE-2026-33865/[ADVISORY]
https://github.com/mlflow/mlflow/pull/21435[FIX]
https://afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectors[EVIDENCE]
https://github.com/advisories/GHSA-fh64-r2vc-xvhr[ADVISORY]