CVE-2026-2611: In MLflow version 3.9.0, the MLflow Assistant feature introduced improper origin validation in its /ajax-api endpoints.

MLflow version 3.9.0 has a vulnerability in its Assistant feature where /ajax-api endpoints don't properly validate the origin (the source website making a request). This allows an attacker on a malicious webpage to send cross-origin requests (requests from a different domain) to trick the MLflow Assistant running on a victim's computer, bypass security restrictions meant to only allow local access, and execute arbitrary commands (run any code they choose) through the Claude Code sub-agent.