CVE-2026-8147

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.

CVSS 3.0

8.1CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

EPSS

0.5% chance of exploitation in the next 30 days; higher than 45% of CVEs (scores of 2026-10-25)

CWE

CWE-284

Published

2026-07-02

Modified

2026-10-25

Record from

the NVD, synced 2026-10-25

Affected

• lfprojects:mlflow

Packages (OSV)

References

• https://github.com/mlflow/mlflow/commit/f9b1eb510478570609ef451984a255775aa4b937
• https://huntr.com/bounties/b00c3ddd-373e-492f-9bf0-41a28bb21ed5
• https://huntr.com/bounties/b00c3ddd-373e-492f-9bf0-41a28bb21ed5

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