Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions.
CVE-2026-121746
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, nvm use --save and nvm install --save (or -w) write the resolved version to $PWD/.nvmrc with tee, which follows a symbolic link. A repository that commits .nvmrc as a symlink to a path outside itself (git recreates the link on clone) therefore makes --save truncate any file the user can write, such as a shell startup file or ~/.ssh/authorizedkeys, and replace its contents with the version string, or create the target of a dangling link; the link itself is left unchanged, so git status stays clean. The attacker does not control the content written, so this is data loss, not code execution. Version 0.41.0 refuses, with a warning, to write when .nvmrc in the current directory is a symlink, dangling or not, rather than writing through it or replacing it.
Assessment
- CVSS
- 6.7 (v4.0)
- Severity
- Medium
- Known exploited
- Not listed in CISA KEV
- Exploit availability
- Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
- Published
- 4 November 2026
- Last updated
- 10 November 2026
- Weakness
- CWE-59
- Assigner
- 7ffcee3d-2c14-4c3e-b844-86c6a321a158
CVSS vectorCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
At the source
References
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