Vulnerability Report

CVE-2026-3198

Title: MLflow Basic-Auth Authorization Bypass for Gateway API List Endpoints

Other

Proof Of Concept

No public PoC currently indexed for CVE-2026-3198.

CWE Category CWE-284

Published Date Jun 02, 2026

Modified Date Jun 03, 2026

Exploit Status Not Found

Score 6.5 CVSS v3.0

Exploit Probability (EPSS)

0.21%

Vulnerability Summary

CVE-2026-3198: 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.

Impacted Vendors

lfprojects 1

Reference Links

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

CVSS v3.0

Source Entity [email protected]

Severity MEDIUM

6.5

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-3198 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

June 03, 2026 MODIFIED

Vulnerability data updated via NVD.

June 02, 2026 MODIFIED

Vulnerability data updated via NVD.

June 02, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


                                    CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected Stack

No specific products linked.