MLflow AI Gateway Server-Side Request Forgery Information Disclosure Vulnerability

October 29th, 2026
ZDI-26-847 ZDI-CAN-31895

CVE ID

CVE-2026-71211

CVSS Score

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

Affected Vendors

MLflow

Affected Products

MLflow

Vulnerability Details

This vulnerability allows remote attackers to initiate arbitrary server-side requests on affected installations of MLflow. Authentication is required to exploit this vulnerability.

The specific flaw exists within the processing of the api_base field. The issue results from the lack of proper validation of a URI prior to accessing resources. An attacker can leverage this vulnerability to initiate requests in the context of the service account.

Additional Details

Fixed in MLflow 3.17.0
https://github.com/mlflow/mlflow/pull/25761


Disclosure Timeline

  • 2026-06-30 - Vulnerability reported to vendor
  • 2026-10-29 - Coordinated public release of advisory
  • 2026-10-29 - Advisory Updated

Credit

s3zer0

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