CVE-2026-56672 ComfyUI: Stored XSS via /userdata/{file} due to Missing Content-Type Sanitization

ComfyUI is a node-based diffusion model GUI, API, and backend. Prior to 0.28.0, GET /userdata/file served user-controlled HTML and SVG files with extension-derived content types, allowing stored cross-site scripting in the ComfyUI origin and access to browser-stored API tokens, settings, workflow...