CVE-2026-3198 Details
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.
An authorization bypass vulnerability has been identified in MLflow version 3.9.0 when using basic authentication. The issue arises because the application fails to enforce authorization checks for several Gateway API 'list' endpoints. Specifically, the 'BEFORE_REQUEST_HANDLERS' dictionary does not include necessary entries for 'ListGatewaySecretInfos', 'ListGatewayEndpoints', and 'ListGatewayModelDefinitions'. As a result, any authenticated user can enumerate all gateway secrets, endpoints, and model definitions, exposing sensitive information such as API keys, endpoint configurations, and proprietary model definitions to unauthorized users.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jun 2, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://huntr.com/bounties/e57db731-97d3-40c3-a429-831ee959807f | CISA-ADP | ExploitThird Party Advisory |
| https://huntr.com/bounties/e57db731-97d3-40c3-a429-831ee959807f | [email protected] | ExploitThird Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-284 | Improper Access Control | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| lfprojects mlflow | 3.9.0 - |
CPE
Remediation
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Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 21, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 3, 2026 | Initial Analysis | [email protected] |
| Jun 2, 2026 | CVE Modified | CISA-ADP |
| Jun 2, 2026 | New CVE Received | [email protected] |