Authenticated information disclosure via missing list authorization
Published Jun 2, 2026 · Updated Jun 2, 2026
Improper access control in MLflow 3.9.0 allows remote authenticated users to enumerate protected AI Gateway resources. The BEFORE_REQUEST_HANDLERS mapping in mlflow/server/auth/init.py omits ListGatewaySecretInfos, ListGatewayEndpoints, and ListGatewayModelDefinitions, so those list requests bypass resource permission checks. Basic authentication must be enabled, and any valid account can disclose API keys, endpoint configuration, and proprietary model definitions assigned to other users.
Summary
What happened
Improper access control in MLflow 3.9.0 allows remote authenticated users to enumerate protected AI Gateway resources. The BEFORE_REQUEST_HANDLERS mapping in mlflow/server/auth/init.py omits ListGatewaySecretInfos, ListGatewayEndpoints, and ListGatewayModelDefinitions, so those list requests bypass resource permission checks. Basic authentication must be enabled, and any valid account can disclose API keys, endpoint configuration, and proprietary model definitions assigned to other users.
The record
- CVE
- CVE-2026-3198
- Published
- Jun 2, 2026
- Updated
- Jun 2, 2026
- Vendor
- MLflow Project
- Product
- MLflow
- Classifications
- CWE-284, T1213
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 2, 2026CVE publishedPublication date reported by the CVE source.
- Jun 2, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=unspecified <=latest
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- Huntr Gateway list authorization proof of conceptproof of concept · unverified
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Technologies
Your stack
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Your stack
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