PYSEC-2026-418 MLflow: Improper Origin Validation in MLflow Assistant /ajax-api Endpoints Enables Browser-Mediated Local Command Execution

In MLflow version 3.9.0, the MLflow Assistant feature introduced improper origin validation in its /ajax-api endpoints. This vulnerability allows a remote attacker to exploit cross-origin requests from a malicious webpage to interact with the MLflow Assistant running on a victim's local machine. ...

Origin Validation Error

Overview mlflow is a platform to streamline machine learning development, including tracking experiments, packaging code into reproducible runs, and sharing and deploying models. Affected versions of this package are vulnerable to Origin Validation Error in the /ajax-api endpoints. An attacker ca...

Improper Origin Validation in MLflow Assistant /ajax-api Endpoints Enables Browser-Mediated Local Command Execution

Description Analyzed project version: MLflow 3.9.0 /version, commit 6e61043b0ff5d845bea479d7e7ea24dcd4b2c629. In MLflow 3.9.0, a new feature called MLflow Assistant was introduced, intended only for local development and designed to integrate with Claude Code accepting requests only from loopback...