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CVE-2026-73414— Shescape: Shell injection via unescaped parentheses on Windows with CMD

CVSS 9.2 · Critical EPSS 0.48% · P39

Affected Version Matrix 2

VendorProductVersion RangeStatus
ericcornelissenshescape< 2.1.14affected
>= 3.0.0, < 3.0.1affected
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I. Basic Information for CVE-2026-73414

Vulnerability Information
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Vulnerability Title
Shescape: Shell injection via unescaped parentheses on Windows with CMD
Source: CVE Program / CVE List V5
Vulnerability Description
Shescape is a simple shell escape library for JavaScript. Prior to 2.1.14 and 3.0.1, getEscapeFunction in src/internal/win/cmd.js does not escape `(` and `)` when applications use the escape or escapeAll APIs on Windows with shell set to cmd.exe, or with shell set to true when CMD is the default. An attacker-controlled argument can break out of a parenthesized CMD construct and inject shell syntax depending on the original command, resulting in arbitrary command execution. This issue is fixed in versions 2.1.14 and 3.0.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/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
Eric Cornelissen Shescape 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Eric Cornelissen Shescape是Eric Cornelissen个人开发者开源的一个Shell转义工具库。 Eric Cornelissen Shescape 2.1.14之前版本和3.0.0至3.0.1之前版本存在安全漏洞，该漏洞源于src/internal/win/cmd.js中的getEscapeFunction函数未对`(`和`)`进行转义，可能导致攻击者控制的参数突破括号CMD结构并注入shell语法，造成任意命令执行。
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

VendorProductAffected VersionsCPESubscribe
ericcornelissenshescape < 2.1.14 -

II. Public POCs for CVE-2026-73414

#POC DescriptionSource LinkShenlong Link
AI-Generated POCVerified env Premium
Qwen3.6-35B-A3B · 6906 chars
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III. Intelligence Information for CVE-2026-73414

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Patches & Fixes for CVE-2026-73414 (4)

Vendor Advisories for CVE-2026-73414 (1)

Other References for CVE-2026-73414 (2)

Same Patch Batch · ericcornelissen · 2026-08-12 · 4 CVEs total

CVE-2026-734138.7 HIGHShescape: Quadratic-time denial of service in flag-protection
CVE-2026-734126.3 MEDIUMShescape: Path disclosure on Unix with Zsh
CVE-2026-734116.3 MEDIUMShescape: Home-directory disclosure in assignment context on Unix with Dash

IV. Related Vulnerabilities

Same product: shescape
Same vendor: ericcornelissen
Same weakness: CWE-78

V. Comments for CVE-2026-73414

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