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CVE-2026-32260— Command Injection via incomplete shell metacharacter blocklist in node:child_process (bypass of CVE-2026-27190 fix)

Quick assessment

Affected
denoland deno
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.

Deno是Deno开源的一个简单、现代且安全的 JavaScript 和 TypeScript 运行环境。 Deno 2.7.0版本至2.7.1版本存在操作系统命令注入漏洞，该漏洞源于node:child_process polyfill中存在命令注入，可能导致绕过权限系统执行任意操作系统命令。

CVSS 8.1 · High EPSS 1.96% · P80
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I. Basic Information for CVE-2026-32260

Vulnerability Information
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Vulnerability Title
Command Injection via incomplete shell metacharacter blocklist in node:child_process (bypass of CVE-2026-27190 fix)
Source: CVE Program / CVE List V5
Vulnerability Description
Deno is a JavaScript, TypeScript, and WebAssembly runtime. From 2.7.0 to 2.7.1, A command injection vulnerability exists in Deno's node:child_process polyfill (shell: true mode) that bypasses the fix for CVE-2026-27190. The two-stage argument sanitization in transformDenoShellCommand (ext/node/polyfills/internal/child_process.ts) has a priority bug: when an argument contains a $VAR pattern, it is wrapped in double quotes (L1290) instead of single quotes. Double quotes in POSIX sh do not suppress backtick command substitution, allowing injected commands to execute. An attacker who controls arguments passed to spawnSync or spawn with shell: true can execute arbitrary OS commands, bypassing Deno's permission system. This vulnerability is fixed in 2.7.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/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
Vulnerability Title
Deno 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Deno是Deno开源的一个简单、现代且安全的 JavaScript 和 TypeScript 运行环境。 Deno 2.7.0版本至2.7.1版本存在操作系统命令注入漏洞，该漏洞源于node:child_process polyfill中存在命令注入，可能导致绕过权限系统执行任意操作系统命令。
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
denoland deno >= 2.7.0, < 2.7.2 -

II. Public POCs for CVE-2026-32260

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III. Intelligence Information for CVE-2026-32260

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Vendor Advisories for CVE-2026-32260 (1)

IV. Related Vulnerabilities

Same product: deno
Same vendor: denoland
Same weakness: CWE-78

V. Comments for CVE-2026-32260

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