Free AI Safety Workshop — in collaboration with explainx.aiSave your seat
AgentbeamBeta
AI agent vulnerability · MLflow

CVE-2026-8147: MLflow: trace API endpoints lack proper authorization validators

highCVSS 3.0 8.1GHSA-2cm6-r77w-6g96

In MLflow versions prior to 3.13.0, when running with authentication enabled, the trace API endpoints lack proper authorization validators. This allows any authenticated user to bypass experiment-level authorization controls on all trace operations, including reading, deleting, and modifying traces on experiments they do not have permission to access.

Published Jul 2, 2026 · Updated Aug 13, 2026

Affected packages

mlflow

Ecosystem
PyPI
Affected
>= 2.14.0rc0, < 3.13.0rc0
Fixed in
3.13.0rc0
Check
pip show mlflow

Advisory details

From the GitHub Advisory Database (CC BY 4.0).

In MLflow versions prior to 3.13.0, when running with authentication enabled, the trace API endpoints lack proper authorization validators. This allows any authenticated user to bypass experiment-level authorization controls on all trace operations, including reading, deleting, and modifying traces on experiments they do not have permission to access. The issue arises from the _before_request handler, which does not register authorization validators for trace endpoints, resulting in requests proceeding without validation. This vulnerability can expose sensitive data, destroy audit logs, and allow unauthorized modifications.

Credited to 0x00-sys.

References

How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology

More MLflow vulnerabilities

All MLflow entries