Shell Escape Vulnerability in Shescape Library for JavaScript
CVE-2026-73414

9.2CRITICAL

Key Information:

Vendor

Ericcornelissen

Status
Shescape
Vendor
CVE Published:
12 August 2026

What is CVE-2026-73414?

The Shescape library for JavaScript contains a vulnerability that allows an attacker to exploit unescaped parentheses in command arguments when utilizing the escape or escapeAll APIs on Windows systems with cmd.exe. This flaw can lead to unauthorized command execution, as an attacker may break out of the intended command structure, injecting harmful shell syntax. This issue was addressed in versions 2.1.14 and 3.0.1 of the library.

Affected Version(s)

shescape < 2.1.14 < 2.1.14

shescape >= 3.0.0, < 3.0.1 < 3.0.0, 3.0.1

References

https://github.com/ericcornelissen/shescape/security/advi...
x_refsource_CONFIRM
https://github.com/ericcornelissen/shescape/pull/2649
x_refsource_MISC
https://github.com/ericcornelissen/shescape/pull/2651
x_refsource_MISC

CVSS V4

Score:
9.2
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.