CVE-2026-121745 nvm exposes NVM_AUTH_HEADER to other local users on the curl/wget command line
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-121745?
CVE-2026-121745 is a low-severity vulnerability in nvm-sh nvm, published on 4 Nov 2026.
Official description
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 "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.
Weakness: CWE-214
Which versions are affected by CVE-2026-121745?
How do I fix CVE-2026-121745?
No fix has been published for CVE-2026-121745 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-121745 being exploited?
There is no known exploitation of CVE-2026-121745 in the wild and no public exploit code.
Sources
Also known as GHSA-h3c2-g6gc-6cgx.