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CVE-2026-1665— Command Injection in nvm via NVM_AUTH_HEADER in wget code path

Quick assessment

Affected
nvm-sh nvm
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Node Version Manager是nvm.sh开源的一个节点版本管理器。 Node Version Manager 0.40.3及之前版本存在安全漏洞，该漏洞源于nvm_download函数使用eval执行wget命令且NVM_AUTH_HEADER环境变量未清理，可能导致命令注入。

AI Predicted 6.5 Difficulty: Hard EPSS 0.79% · P56
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I. Basic Information for CVE-2026-1665

Vulnerability Information
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Vulnerability Title
Command Injection in nvm via NVM_AUTH_HEADER in wget code path
Source: CVE Program / CVE List V5
Vulnerability Description
A command injection vulnerability exists in nvm (Node Version Manager) versions 0.40.3 and below. The nvm_download() function uses eval to execute wget commands, and the NVM_AUTH_HEADER environment variable was not sanitized in the wget code path (though it was sanitized in the curl code path). An attacker who can set environment variables in a victim's shell environment (e.g., via malicious CI/CD configurations, compromised dotfiles, or Docker images) can inject arbitrary shell commands that execute when the victim runs nvm commands that trigger downloads, such as 'nvm install' or 'nvm ls-remote'.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Node Version Manager 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Node Version Manager是nvm.sh开源的一个节点版本管理器。 Node Version Manager 0.40.3及之前版本存在安全漏洞，该漏洞源于nvm_download函数使用eval执行wget命令且NVM_AUTH_HEADER环境变量未清理，可能导致命令注入。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
nvm-sh nvm 0.40.0 ~ 0.40.3 -

II. Public POCs for CVE-2026-1665

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III. Intelligence Information for CVE-2026-1665

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Other References for CVE-2026-1665 (1)

IV. Related Vulnerabilities

Same product: nvm
Same vendor: nvm-sh
Same weakness: CWE-78