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.
Published: 2026-08-12
Score: 9.2 Critical
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-w4hw-qcx7-56pr Shescape: Shell injection via unescaped parentheses on Windows with CMD
History

Wed, 12 Aug 2026 21:30:00 +0000

Type Values Removed Values Added
First Time appeared Ericcornelissen
Ericcornelissen shescape
Vendors & Products Ericcornelissen
Ericcornelissen shescape

Wed, 12 Aug 2026 19:45:00 +0000

Type Values Removed Values Added
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.
Title Shescape: Shell injection via unescaped parentheses on Windows with CMD
Weaknesses CWE-150
CWE-78
References
Metrics cvssV4_0

{'score': 9.2, 'vector': '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'}


Subscriptions

Ericcornelissen Shescape
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-08-12T19:42:55.520Z

Reserved: 2026-08-12T14:32:11.795Z

Link: CVE-2026-73414

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-12T20:17:56.510

Modified: 2026-08-12T20:17:56.510

Link: CVE-2026-73414

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-12T21:15:09Z

Weaknesses
  • CWE-150

    Improper Neutralization of Escape, Meta, or Control Sequences

  • CWE-78

    Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')