MEDIUM 4.3

PYSEC-2026-94

Details

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

Are you affected?

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Affected packages

PyPI / mlflow

Introduced in: 0 Fixed in: 3.11.0rc0

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

References

https://cert.pl/en/posts/2026/04/CVE-2026-33865/ [ADVISORY]
https://github.com/mlflow/mlflow/pull/21708 [FIX]
https://afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectors [EVIDENCE]