{"id":"CVE-2026-121747","published":"2026-11-04T22:17:54.337","lastModified":"2026-11-04T22:17:54.337","description":"Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions. In versions 0.2.0 through 0.40.8, nvm does not check whether `.nvmrc` is a symbolic link. A repository or archive that ships `.nvmrc` as a symlink to another file (for example `../../.npmrc`, or `/proc/self/environ` on Linux) makes a plain `nvm use`, `nvm install`, `nvm which`, `nvm exec`, `nvm run`, or `nvm-exec` read that file and print its contents in the invalid-`.nvmrc` message (even with `--silent`) or, for a one-line file, in the `Found ... with version <...>` message; with the README's zsh `load-nvmrc` or bash `cdnvm` hook installed, entering the directory is enough. nvm sends the content nowhere; the attacker learns it only where they can see the victim's output, such as a CI log for a contributed branch. Version 0.41.0 still follows a symlinked `.nvmrc`, so deliberate links to another version file keep working, but never prints its content, and accepts it only if it contains a version or the name of an existing alias; the README's bash `cdnvm` hook, which read `.nvmrc` itself, now gets the version from nvm, so users of that hook must also update their copy of it.","cvssScore":5.5,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","cwes":["CWE-59","CWE-61","CWE-200"],"vendors":[],"products":[],"references":[{"url":"https://github.com/nvm-sh/nvm/commit/67268ebcb6e1a26ae3d71b3710d6333bb7358662","tags":[]},{"url":"https://github.com/nvm-sh/nvm/commit/c314f1cbb3c301c587a4e4f96511d31f1134ffd1","tags":[]},{"url":"https://github.com/nvm-sh/nvm/security/advisories/GHSA-j6ch-mq5c-3h4x","tags":[]}],"exploitRefs":[{"url":"https://github.com/nvm-sh/nvm/commit/67268ebcb6e1a26ae3d71b3710d6333bb7358662","tags":[]},{"url":"https://github.com/nvm-sh/nvm/commit/c314f1cbb3c301c587a4e4f96511d31f1134ffd1","tags":[]},{"url":"https://github.com/nvm-sh/nvm/security/advisories/GHSA-j6ch-mq5c-3h4x","tags":[]}],"hasPoc":true,"ai":null}