CVE Watch20 jul 2026

CVE-2026-53592

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. A Prototype Pollution condition in the `getQueryParam` fu

CVSS

4.6

Medio

EPSS

0.1%

KEV

—

Exploit Today

0-100

Publicado: 20 jul 2026 · Última mod.: 20 jul 2026 · CWE-1321

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. A Prototype Pollution condition in the `getQueryParam` function `/public/js/main.js` and was addressed in version 1.8.139 by blocking URL query keys matching the pattern `__proto__`. However, this mitigation is incomplete: it only filters top-level `__proto__` keys and fails to sanitize nested forms such as `b[__proto__][polluted]=PWNED`. As a result, an attacker-controlled URL query string can still write into `Object.prototype` on any page that loads `main.js`. Version 1.8.223 contains a updated fix.

Referencias oficiales

github.comhttps://github.com/freescout-help-desk/freescout/security/advisories/GHSA-w5fc-8pp3-f755

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