CVE-2026-76844 webpack-dev-middleware Path Traversal via Offset Slice on a Non-Slash-Terminated publicPath

webpack-dev-middleware resolves a request to a local file in getFilenameFromUrl by testing the request pathname against a traversal guard and then slicing it at a fixed character offset. The guard, UPPATHREGEXP applied to path.normalize./$pathname, only matches ".." that stands as a whole path...

CVE-2026-76844 webpack-dev-middleware Path Traversal via Offset Slice on a Non-Slash-Terminated publicPath

webpack-dev-middleware resolves a request to a local file in getFilenameFromUrl by testing the request pathname against a traversal guard and then slicing it at a fixed character offset. The guard, UPPATHREGEXP applied to path.normalize./$pathname, only matches ".." that stands as a whole path...