CVE-2026-121748 (GCVE-0-2026-121748)

Vulnerability from cvelistv5 – Published: 2026-11-04 21:29 – Updated: 2026-11-04 21:29
VLAI
Title
nvm use --delete-prefix lets a project .npmrc choose which file npm rewrites or makes world-writable
Summary
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.
Severity
1.8 (Low)
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
3.6 (Low)
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L
CWE
  • CWE-73 - External Control of File Name or Path
Assigner
harborist CNA under the redhat root
CNA scorecard B 86/100 over 22 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
nvm-sh nvm Affected: 0.27.0 , < 0.41.0 (semver)
guessed Create a notification for this product.
Credits
Anthropic's OSS Scanner, as vulnerability ANT-2026-WYRTKBQ5 Jordan Harband (https://github.com/ljharb)
Show details on NVD website
To clipboard 

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}



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