Windmill versions 1.276.0 through 1.603.2 contain an authorization bypass vulnerability in the folder management API endpoints. The endpoints for creating, deleting, and managing folder ownership do not enforce role-based access control for operator-level users. In Windmill, operators are restricted users intended to only execute existing scripts, but due to missing server-side authorization checks, operators can create folders, manage folder permissions, and access owner management endpoints. This bypass serves as the prerequisite for exploiting CVE-2026-23696 (SQL injection via folder addowner) enabling full privilege escalation from operator to super admin with remote code execution.
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