CVE-2026-66063: Improper Limitation of a Pathname to a Restricted Directory

goshs is a feature-rich single-binary file server for red teamers and developers. Prior to 2.1.5, the httpserver/updown.go multipart upload handler split part.FileName on / but did not reject .., allowing an unauthenticated upload with filename .. to create a file outside the served tree. This...