CVE-2026-53592

{
  "id": "CVE-2026-53592",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-20T20:16:44.747",
  "lastModified": "2026-10-24T20:10:00.137",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "FreeScout es una mesa de ayuda gratuita y bandeja de entrada compartida construida con el framework Laravel de PHP. Una condición de Contaminación de Prototipos en la función ’getQueryParam’ de ’/public/js/main.js’ fue abordada en la versión 1.8.139 mediante el bloqueo de claves de consulta URL que coinciden con el patrón ’__proto__’. Sin embargo, esta mitigación es incompleta: solo filtra claves ’__proto__’ de nivel superior y no logra sanear formas anidadas como ’b[__proto__][polluted]=PWNED’. Como resultado, una cadena de consulta URL controlada por un atacante todavía puede escribir en ’Object.prototype’ en cualquier página que cargue ’main.js’. La versión 1.8.223 contiene una corrección actualizada."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "freescout-help-desk",
          "product": "freescout",
          "versions": [
            {
              "version": "< 1.8.223",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L",
          "baseScore": 4.6,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "LOW",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 3.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-21T14:42:11.918943Z",
          "id": "CVE-2026-53592",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1321"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-w5fc-8pp3-f755",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-w5fc-8pp3-f755",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}