{"id":"CVE-2026-121748","published":"2026-11-04T22:17:54.523","lastModified":"2026-11-04T22:17:54.523","description":"Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions. In versions 0.27.0 through 0.40.8, when a project's `.npmrc` sets `prefix`, `nvm use` tells the user to run `nvm use --delete-prefix`, which runs `npm config delete prefix` and `npm config delete globalconfig` in the current directory without naming a config file. npm loads the project `.npmrc` before deciding which file to edit, so that file chooses the target: `userconfig=~/.bashrc` makes npm rewrite `~/.bashrc` as ini (corrupting it), and `location=global` with `globalconfig=` leaves the chosen file at mode 0666, which on a shared machine lets another local user write to it. The attacker (the author of a cloned repository or archive, or a local user who can write a shared parent directory) chooses the file but not the bytes written, and no project code runs. Version 0.41.0 no longer lets a project `.npmrc` select which config file `--delete-prefix` edits.","cvssScore":3.6,"cvssSeverity":"LOW","cvssVector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L","cwes":["CWE-73"],"vendors":[],"products":[],"references":[{"url":"https://github.com/nvm-sh/nvm/commit/4049296ca8eef2067517d8cfd5ef5c0e615daa10","tags":[]},{"url":"https://github.com/nvm-sh/nvm/security/advisories/GHSA-ccgf-7gv4-xg5h","tags":[]}],"exploitRefs":[{"url":"https://github.com/nvm-sh/nvm/commit/4049296ca8eef2067517d8cfd5ef5c0e615daa10","tags":[]},{"url":"https://github.com/nvm-sh/nvm/security/advisories/GHSA-ccgf-7gv4-xg5h","tags":[]}],"hasPoc":true,"ai":null}