CVE-2026-33994
Gravedad CVSS v4.0:
MEDIA
Tipo:
No Disponible / Otro tipo
Fecha de publicación:
27/03/2026
Última modificación:
01/04/2026
Descripción
*** Pendiente de traducción *** Locutus brings stdlibs of other programming languages to JavaScript for educational purposes. Starting in version 2.0.39 and prior to version 3.0.25, a prototype pollution vulnerability exists in the `parse_str` function of the npm package locutus. An attacker can pollute `Object.prototype` by overriding `RegExp.prototype.test` and then passing a crafted query string to `parse_str`, bypassing the prototype pollution guard. This vulnerability stems from an incomplete fix for CVE-2026-25521. The CVE-2026-25521 patch replaced the `String.prototype.includes()`-based guard with a `RegExp.prototype.test()`-based guard. However, `RegExp.prototype.test` is itself a writable prototype method that can be overridden, making the new guard bypassable in the same way as the original — trading one hijackable built-in for another. Version 3.0.25 contains an updated fix.
Impacto
Puntuación base 4.0
6.30
Gravedad 4.0
MEDIA
Puntuación base 3.x
9.80
Gravedad 3.x
CRÍTICA
Productos y versiones vulnerables
| CPE | Desde | Hasta |
|---|---|---|
| cpe:2.3:a:locutus:locutus:*:*:*:*:*:node.js:*:* | 2.0.39 (incluyendo) | 3.0.25 (excluyendo) |
Para consultar la lista completa de nombres de CPE con productos y versiones, ver esta página
Referencias a soluciones, herramientas e información
- https://github.com/locutusjs/locutus/commit/345a6211e1e6f939f96a7090bfeff642c9fcf9e4
- https://github.com/locutusjs/locutus/pull/597
- https://github.com/locutusjs/locutus/releases/tag/v3.0.25
- https://github.com/locutusjs/locutus/security/advisories/GHSA-vc8f-x9pp-wf5p
- https://github.com/locutusjs/locutus/security/advisories/GHSA-vc8f-x9pp-wf5p
- https://github.com/locutusjs/locutus/security/advisories/GHSA-vc8f-x9pp-wf5p
- https://github.com/locutusjs/locutus/security/advisories/GHSA-vc8f-x9pp-wf5p



