CVE-2026-3198: Lfprojects MLflow

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

MLflow 3.9.0 with basic-auth (`--app-name basic-auth`) fails to enforce authorization checks for multiple Gateway API 'list' endpoints. Specifically, the `BEFORE_REQUEST_HANDLERS` dictionary in `mlflow/server/auth/__init__.py` does not include entries for `ListGatewaySecretInfos`, `ListGatewayEndpoints`, and `ListGatewayModelDefinitions`. This allows any authenticated user, regardless of their assigned permissions, to enumerate all gateway secrets, endpoints, and model definitions. This vulnerability exposes sensitive information, such as API keys, endpoint configurations, and proprietary model definitions, to unauthorized users.

Affected products

• Lfprojects MLflow: version 3.9.0 only

Published 2026-06-02. Last modified 2026-07-21.