GitHub Advisoryadvisory · PyPI

GHSA-w5xq-c4pf-ghq7 MLflow authenticated users can enumerate any registered model versions due to lack of per-model permissions checks

MEDIUM Published 2026-05-21 Modified 2026-06-12 Official page ↗
Aliases
CVE-2026-2734
Ecosystem
PyPI
Packages
mlflow
Severity
Moderate
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weaknesses
CWE-284
Reviewed
2026-06-12

Affected packages

• PyPI mlflow: < 3.10.0 → fixed in 3.10.0

Description

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.

Related

Alias · CVE (1)

  • CVE-2026-2734 In mlflow/mlflow versions up to 3.9.0, the `SearchModelVersions` REST API endpoint and the `mlflowSearchModelVersions` GraphQL query lack… vulnerability

Weakness · CWE (1)

  • CWE-284 Improper Access Control weakness

References