CVE-2021-37701

A flaw was found in the npm package “tar” (aka node-tar). Extracting tar files that contain both a directory and a symlink with the same name, where the symlink and directory names in the archive entry used backslashes as a path separator, made it possible to bypass node-tar symlink checks on directories. This flaw allows an untrusted tar file to extract and overwrite files into an arbitrary location. A similar confusion can arise on case-insensitive filesystems. The highest threat from this vulnerability is to integrity and system availability.