CVE-2026-8147: Lfprojects MLflow

High severity, CVSS 8.1. EPSS: 0.5% chance of exploitation in the next 30 days.

In MLflow versions prior to 3.14.0, 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.

Affected products

• Lfprojects MLflow: before 3.14.0 (fixed in 3.14.0)

Published 2026-07-02. Last modified 2026-07-06.