CVE-2026-73414 PUBLISHED

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.

• https://github.com/ericcornelissen/shescape/security/advisories/GHSA-w4hw-qcx7-56pr
• https://github.com/ericcornelissen/shescape/pull/2649
• https://github.com/ericcornelissen/shescape/pull/2651
• https://github.com/ericcornelissen/shescape/commit/43d70b59d09bbe5c3fd02ef08b3a123e977ed9de
• https://github.com/ericcornelissen/shescape/commit/b4b34c394e7f9da2775bb75381066b9a228c425f
• https://github.com/ericcornelissen/shescape/releases/tag/v2.1.14
• https://github.com/ericcornelissen/shescape/releases/tag/v3.0.1

• CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') CWE
• CWE-150: Improper Neutralization of Escape, Meta, or Control Sequences CWE