Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions. In versions 0.40.0 through 0.40.8, "nvm use --save" and "nvm install --save" (or "-w") write the resolved version to "$PWD/.nvmrc" with "tee", which follows a symbolic link. A repository that commits ".nvmrc" as a symlink to a path outside itself (git recreates the link on clone) therefore makes "--save" truncate any file the user can write, such as a shell startup file or "~/.ssh/authorized_keys", and replace its contents with the version string, or create the target of a dangling link; the link itself is left unchanged, so "git status" stays clean. The attacker does not control the content written, so this is data loss, not code execution. Version 0.41.0 refuses, with a warning, to write when ".nvmrc" in the current directory is a symlink, dangling or not, rather than writing through it or replacing it.