CVE-2026-33866: MLflow is vulnerable to an authorization bypass affecting the AJAX endpoint
(updated )
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
References
- afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectors
- cert.pl/en/posts/2026/04/CVE-2026-33865
- github.com/advisories/GHSA-46r5-x6jq-v8g6
- github.com/mlflow/mlflow/commit/005b959cacda05d1423356cfcbd9ebeda8ff96a7
- github.com/mlflow/mlflow/pull/21708
- github.com/pypa/advisory-database/tree/main/vulns/mlflow/PYSEC-2026-94.yaml
- nvd.nist.gov/vuln/detail/CVE-2026-33866
Code Behaviors & Features
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