pnpm has symlink traversal in file:/git dependencies

pnpm is a package manager. Prior to version 10.28.2, when pnpm installs a file: (directory) or git: dependency, it follows symlinks and reads their target contents without constraining them to the package root. A malicious package containing a symlink to an absolute path (e.g., /etc/passwd, ~/.ssh/id_rsa) causes pnpm to copy that file's contents into node_modules, leaking local data. The vulnerability only affects file: and git: dependencies. Registry packages (npm) have symlinks stripped during publish and are NOT affected. The issue impacts developers installing local/file dependencies andCI/CD pipelines installing git dependencies. It can lead to credential theft via symlinks to ~/.aws/credentials, ~/.npmrc, ~/.ssh/id_rsa. Version 10.28.2 contains a patch.