CVE-2026-2734

In mlflow/mlflow versions up to 3.9.0, the `SearchModelVersions` REST API endpoint and the `mlflowSearchModelVersions` GraphQL query lack proper per-model authorization checks when basic authentication is enabled. This allows any authenticated user to enumerate all model versions across all registered models, regardless of their permission level. The issue arises due to the absence of `SearchModelVersions` in the `BEFORE_REQUEST_VALIDATORS` and `AFTER_REQUEST_HANDLERS` for the REST API, and its omission from `GraphQLAuthorizationMiddleware.PROTECTED_FIELDS` for GraphQL. This vulnerability can expose sensitive information such as model names, version descriptions, source URIs, tags, and other metadata, potentially revealing proprietary or confidential details in multi-tenant environments. The issue is resolved in version 3.10.0.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

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

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/mlflow/mlflow/commit/6989066af33fdcb03588fd71a1a67f8fc5ef12c9	Patch
https://huntr.com/bounties/d632f783-b2c7-4a3b-af5e-1d693e841c08	Exploit Third Party Advisory
https://huntr.com/bounties/d632f783-b2c7-4a3b-af5e-1d693e841c08	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:lfprojects:mlflow:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-05-21 05:16

Updated : 2026-07-23 15:10

NVD link : CVE-2026-2734

Mitre link : CVE-2026-2734

CVE.ORG link : CVE-2026-2734

JSON object : View

Products Affected

lfprojects

mlflow

CWE

CWE-284

Improper Access Control

NVD-CWE-noinfo

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