CVE-2026-15921— nvm path traversal via a malicious mirror's LTS codename writes outside the alias directory

nvm path traversal via a malicious mirror's LTS codename writes outside the alias directory

Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions. In versions 0.32.1 through 0.40.5, `nvm ls-remote` (and other commands that refresh remote LTS aliases, such as `nvm install --lts`) parse the node.js mirror's `index.tab` and use each release's LTS codename field as an alias filename without validating it. A malicious, compromised, or man-in-the-middled mirror can return an LTS codename containing path-traversal sequences such as `../../../.bashrc`, causing nvm to write the associated version string to a path outside `$NVM_DIR/alias`. With the default layout (`$NVM_DIR` is `~/.nvm`), this can create or overwrite files in the user's home directory, including shell startup files, which can lead to code execution in a later shell session. Exploitation requires the victim to use a hostile mirror -- via a compromised mirror or CDN, a network man-in-the-middle, or a maliciously configured `NVM_NODEJS_ORG_MIRROR`/`NVM_IOJS_ORG_MIRROR` -- and to run an affected command. Version 0.40.6 validates remote LTS codenames as safe alias filenames and rejects `..` path components when writing alias files.

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N

对路径名的限制不恰当(路径遍历)

nvm-sh nvm 路径遍历漏洞

nvm-sh nvm是nvm-sh的消息队列中间件。 nvm 0.32.1版本至0.40.5版本存在安全漏洞，该漏洞源于未验证远程LTS别名的路径遍历序列，可能导致恶意镜像在用户主目录创建或覆盖文件，包括shell启动文件，从而在后续shell会话中导致代码执行。

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