Accept user file uploads without introducing remote code execution, stored XSS, or polyglot attacks. Covers magic-byte validation, strict type allowlists, image re-encoding to defang embedded payloads, EXIF stripping, virus scanning, path-safe storage keys, and serving via a separate origin with Con
Accept user file uploads without introducing remote code execution, stored XSS, or polyglot attacks. Covers magic-byte validation, strict type allowlists, image re-encoding to defang embedded payloads, EXIF stripping, virus scanning, path-safe storage keys, and serving via a separate origin with Content-Disposition. Invoke when adding upload to a new endpoint or migrating from local-disk storage t