{"id":"CVE-2026-121745","title":"nvm exposes NVM_AUTH_HEADER to other local users on the curl/wget command line","summary":"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, when `NVM_AUTH_HEADER` is set, `nvm_download` passes the credential to curl or wget as a `--header …","severity":"low","cvss":2.5,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","cvssSource":"cna","cwe":["CWE-214"],"vendor":"nvm-sh","product":"nvm","affected":["nvm >= 0.40.0 < 0.41.0"],"published":"2026-11-04","updated":"2026-11-04","sourceUpdated":"2026-11-04T21:28:03.234Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-121745","references":[{"url":"https://github.com/nvm-sh/nvm/security/advisories/GHSA-h3c2-g6gc-6cgx","label":"GHSA-h3c2-g6gc-6cgx"},{"url":"https://github.com/nvm-sh/nvm/commit/903e3493699399d049f3af445c2d81688b6a7f5c","label":"Fix commit 903e3493"}],"tags":["cve.org"],"ingestedAt":"2026-11-05T21:36:00.615Z","slug":"CVE-2026-121745","body":"## Overview\n\nNode Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions. In versions 0.40.0 through 0.40.8, when `NVM_AUTH_HEADER` is set, `nvm_download` passes the credential to curl or wget as a `--header \"Authorization: ...\"` command-line argument. Process arguments are visible to every local user (on Linux via `ps` or `/proc//cmdline` unless `/proc` is mounted with `hidepid=`; on macOS via `ps`), so another unprivileged account on the same machine can read the token while nvm is downloading during `nvm ls-remote`, `nvm install`, and similar commands, and gain whatever access it grants on the private mirror. Only users who set `NVM_AUTH_HEADER` on a host shared with other local accounts are affected. Version 0.41.0 passes the header to curl on stdin and to GNU Wget in a private temporary config file. BusyBox wget reads no config file, so when it is the only downloader available the header is still passed as an argument.\n\n## Affected\n\n- `nvm >= 0.40.0 < 0.41.0`\n\n## Remediation\n\nUpgrade to nvm 0.41.0 or later, and on a machine shared with other local users make sure curl or GNU Wget is installed (BusyBox wget still receives the header as an argument).\n\n### Workarounds\n\nUntil upgrading, do not set `NVM_AUTH_HEADER` on machines shared with other local users, or mount `/proc` with `hidepid=2` on Linux.","depth":"sunlit","depthScore":14,"depthScoreParts":{"impact":13.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}