What’s Vulnerable › Vulnerabilities

CVE-2026-3198: Improper Access Control in mlflow/mlflow

• Severity: medium (CVSS 6.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-06-02 · updated 2026-07-21
• Weakness: CWE-284

Description

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

• mlflow/mlflow: 3.9.0

References

• https://huntr.com/bounties/e57db731-97d3-40c3-a429-831ee959807f
• https://huntr.com/bounties/e57db731-97d3-40c3-a429-831ee959807f

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