CVE-2026-45061 Budibase: SSRF via trivial `.tar.gz` substring bypass in Plugin URL upload (`/api/plugin`)

Budibase is an open-source low-code platform. Prior to 3.35.10, the Plugin URL upload endpoint POST /api/plugin validates the submitted URL with a single substring check: url.includes".tar.gz". Any URL containing .tar.gz anywhere in the string — in the path, query string, or fragment — passes thi...