CVE-2026-73414
Critical
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.
SeverityCritical
CVSS9.2
Exploit probability—
ProductShescape
PublishedAug 12, 2026
First seenAug 12, 2026
Weakness typeCWE-78OS command injectionCWE-150CWE-150
How to fix
Update
- shescape2.1.14, 3.0.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| shescapenpm | v < 2.1.14, 3.0.0 ≤ v < 3.0.1 | 2.1.14, 3.0.1 |
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