| Component | MLflow |
| Severity | high (CVSS 8.1) |
| CVSS vector | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
| Published (NVD) | 2026-07-02 |
| Last modified | 2026-07-06 |
| Affected versions | mlflow < 3.14.0 |
| Fixed in | 3.14.0 |
| Weakness | CWE-284 |
| CISA KEV | not listed |
NVD description
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.
What to do
- Upgrade MLflow to
3.14.0or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-8147
- https://github.com/mlflow/mlflow/commit/f9b1eb510478570609ef451984a255775aa4b937
- https://huntr.com/bounties/b00c3ddd-373e-492f-9bf0-41a28bb21ed5
Read more
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