CVE-2026-63429: Missing Authentication for Critical Function

HeyForm is an open-source form builder. Prior to version 3.0.0-rc.9, POST /api/upload has no authentication guard, no global guard, no form-context validation, no openToken requirement, and no session cookie check. Any anonymous internet user can upload files PDF, DOC/DOCX, XLS/XLSX, CSV, TXT, MP...