CVE-2026-8147
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.55%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.0
- 8.1 HIGHCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 0.55% probability · 44th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-284
- Affected
- lfprojects/mlflow
- Source
- security@huntr.dev
References
- https://github.com/mlflow/mlflow/commit/f9b1eb510478570609ef451984a255775aa4b937Patch
- https://huntr.com/bounties/b00c3ddd-373e-492f-9bf0-41a28bb21ed5Exploit, Third Party Advisory
- https://huntr.com/bounties/b00c3ddd-373e-492f-9bf0-41a28bb21ed5Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.