Description

A vulnerability in MLflow versions <=3.10.1.dev0 allows unauthorized access to multipart upload (MPU) endpoints when the `--serve-artifacts` mode is enabled. The authorization logic does not enforce resource-level permission checks for `/mlflow-artifacts/mpu/*` endpoints, enabling attackers to overwrite artifacts belonging to other users. This can lead to unauthorized cross-user writes, model supply chain poisoning, and arbitrary code execution when compromised models are loaded. The issue is resolved in version 3.10.0.

Weaknesses 1

Affected Products 1

References 2

• github.com https://github.com/mlflow/mlflow/commit/d7290811d8f3c95366d80109424edc1fb1ad966f
  Patch
• huntr.com https://huntr.com/bounties/65beb119-d3e0-4e03-af2f-fa98f78f83dc
  ExploitThird Party Advisory

Remediation

• github.com https://github.com/mlflow/mlflow/commit/d7290811d8f3c95366d80109424edc1fb1ad966f
  Patch