CVE-2026-117531 @fastify/multipart vulnerable to Denial of Service via a malformed upload hanging delayed file consumers

@fastify/multipart is the multipart form-data and file upload plugin for the Fastify web framework. In versions 5.3.0 through 10.1.6, the plugin does not propagate a parser error to the file stream when a request body ends inside a file part with no closing boundary, even though the Content-Lengt...