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CVE-2026-7258

Estado: AnalizadaMedia (6.3)—

In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, some functions, including urldecode(), pass signed char to ctype functions (like isxdigit()). On the systems with default signed char and optimized table-lookup ctype functions - such as NetBSD - this can lead to accessing array with negative offset, which can trigger a denial of service.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

PHP — PHP

CWE

Referencias

JSON original (NVD)

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          "options": [
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          "version": "2.0.3",
          "timestamp": "2026-05-11T13:05:55.470310Z"
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          "version": "4.0",
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          "Automatable": "NOT_DEFINED",
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          "valueDensity": "NOT_DEFINED",
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          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
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          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
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  ],
  "published": "2026-05-10T05:16:11.360",
  "references": [
    {
      "url": "https://github.com/php/php-src/security/advisories/GHSA-m8rr-4c36-8gq4",
      "tags": [
        "Vendor Advisory"
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      "source": "security@php.net"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "source": "security@php.net",
      "description": [
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          "value": "CWE-125"
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    },
    {
      "lang": "es",
      "value": "En las versiones de PHP 8.2.* anteriores a la 8.2.31, 8.3.* anteriores a la 8.3.31, 8.4.* anteriores a la 8.4.21, y 8.5.* anteriores a la 8.5.6, algunas funciones, incluyendo urldecode(), pasan signed char a funciones ctype (como isxdigit()). En los sistemas con signed char predeterminado y funciones ctype optimizadas por tabla de búsqueda - como NetBSD - esto puede llevar a acceder a un array con un desplazamiento negativo, lo que puede desencadenar una denegación de servicio."
    }
  ],
  "lastModified": "2026-07-24T08:10:00.150",
  "configurations": [
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