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Database

Improper authorization control for web services In mlflow

Description

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

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem
Component
Affected version
Patched versions

Aliases

1. CVE-2026-338662. NVD-2026-338663. OSV-2026-338664. GCVE-2026-33866

References

1. https://github.com/mlflow/mlflow/pull/217082. https://github.com/mlflow/mlflow/commit/005b959cacda05d1423356cfcbd9ebeda8ff96a73. https://afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectors4. https://cert.pl/en/posts/2026/04/CVE-2026-338655. https://github.com/pypa/advisory-database/tree/main/vulns/mlflow/PYSEC-2026-94.yaml

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