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CVE-2026-57998— better-npm-audit OS Command Injection via registry flag

Quick assessment

Affected
jeemok better-npm-audit
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

better-npm-audit 3.11.0 及以下版本，以及 4.0.0-rc.2 预发布版本中，存在命令注入漏洞。该漏洞源于程序在 文件中构建 npm audit 命令时，直接将用户提供的 选项值插值到命令字符串中，未进行任何验证或引号包裹。随后，该命令字符串通过 中的 执行，从而启动一个 shell。若 registry 值中包含 shell 元字符（如分号、管道符或命令替换符），将导致攻击者能够以运行审计工具的进程权限执行任意操作系统命令。

CVSS 7.8 · High EPSS 0.21% · P12

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 2

VendorProduct Version RangeStatus
jeemok better-npm-audit ≤ 3.11.0 affected
4.0.0-rc.2 affected
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I. Basic Information for CVE-2026-57998

Vulnerability Information
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Vulnerability Title
better-npm-audit OS Command Injection via registry flag
Source: CVE Program / CVE List V5
Vulnerability Description
better-npm-audit through 3.11.0, and the 4.0.0-rc.2 prerelease, builds its npm audit command by interpolating the user-supplied --registry option into a command string in src/handlers/handleInput.ts without validation or quoting, then passes that string to child_process.exec() in index.ts, which spawns a shell. A registry value containing shell metacharacters such as a semicolon, pipe, or command substitution executes arbitrary operating system commands with the privileges of the process running the audit.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
jeemok better-npm-audit 0 ~ 3.11.0 -

II. Public POCs for CVE-2026-57998

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 6389 chars
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In-depth vulnerability mechanism
Trigger conditions & impact
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III. Intelligence Information for CVE-2026-57998

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Patches & Fixes for CVE-2026-57998 (1)

Vendor Advisories for CVE-2026-57998 (1)

Other References for CVE-2026-57998 (2)

IV. Related Vulnerabilities

Same weakness: CWE-78

V. Comments for CVE-2026-57998

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