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    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.

    Published:May 21, 2026
    Last Modified:Jun 2, 2026
    EPS:May 21, 2026
    EPSS Score:0.00023
    CVSS Score:6.5

    Affected Products

    Vendor
    Lfprojects
    Product
    Mlflow
    Vendor
    Mlflow
    Product
    Mlflow/mlflow

    Exploits

    https://huntr.com/bounties/d632f783-b2c7-4a3b-af5e-1d693e841c08https://huntr.com/bounties/d632f783-b2c7-4a3b-af5e-1d693e841c08

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High