CVE-2026-121745: low-severity vulnerability in nvm-sh nvm
nvm exposes NVM_AUTH_HEADER to other local users on the curl/wget command line
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
8Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 2epss 0.1%
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.
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Affected products
nvm-sh · nvmRelated CVEs — nvm-sh nvm
In the same product, most dangerous first.
CVE-2026-10796HIGHnvm executes commands from a malicious Node.js mirror's version stringsEPSS 5.0%CVE-2026-1665MEDIUMCommand Injection in nvm via NVM_AUTH_HEADER in wget code pathEPSS 0.8%CVE-2026-15921LOWnvm path traversal via a malicious mirror's LTS codename writes outside the alias directoryEPSS 0.3%CVE-2026-121751LOWnvm evaluates a malicious mirror's index.tab version strings as shell arithmetic via stored LTS aliasesEPSS 0.2%CVE-2026-94185MEDIUMnvm alias resolution follows `..` and discloses files outside $NVM_DIR/aliasEPSS 0.2%CVE-2026-121747MEDIUMnvm prints the contents of any readable file through a symlinked .nvmrcEPSS 0.2%