CVE-2026-6722

Estado: ModificadaCrítica (9.5)—

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, the SOAP extension's object deduplication mechanism stores pointers to PHP objects in a global map without incrementing their reference counts. When an apache:Map node contains duplicate keys, processing the second entry overwrites the first in the temporary result map, freeing the original PHP object while its stale pointer remains in the map. A subsequent href reference to the freed node can copy the dangling pointer into the result. As PHP string allocations can reclaim the freed memory region, an attacker with control over the SOAP request body can exploit this use-after-free to achieve remote code execution.

CVSS

Versión: 4.0
Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:M/U:Red
Puntuación base: 9.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 1.29%
Percentil entre todas las CVEs puntuadas: 69
Fecha de la puntuación: 5/10/2026

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1190 Exploit Public-Facing Applicationinitial access92 %
Impacto principalT1059 Command and Scripting Interpreterexecution90 %

Vulnerabilidad de use-after-free en extensión SOAP de PHP remota (AV:N, PR:N, UI:N) explotable mediante control del cuerpo SOAP para lograr RCE (remote code execution). CWE-416 (use-after-free) + ejecución de código arbitrario.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account Management Vulnerability Scanning Restrict Web-Based Content Network Segmentation Limit Software Installation Limit Access to Resource Over Network

Tecnologías afectadas (1)

PHP — PHP

CWE

CWE-416
CWE-825

Referencias

JSON original (NVD)

Mostrar

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      "value": "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, the SOAP extension's object deduplication mechanism stores pointers to PHP objects in a global map without incrementing their reference counts. When an apache:Map node contains duplicate keys, processing the second entry overwrites the first in the temporary result map, freeing the original PHP object while its stale pointer remains in the map. A subsequent href reference to the freed node can copy the dangling pointer into the result. As PHP string allocations can reclaim the freed memory region, an attacker with control over the SOAP request body can exploit this use-after-free to achieve remote code execution."
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      "lang": "es",
      "value": "En versiones de PHP 8.2.* anteriores a 8.2.31, 8.3.* anteriores a 8.3.31, 8.4.* anteriores a 8.4.21 y 8.5.* anteriores a 8.5.6, el mecanismo de deduplicación de objetos de la extensión SOAP almacena punteros a objetos PHP en un mapa global sin incrementar sus recuentos de referencia. Cuando un nodo apache:Map contiene claves duplicadas, el procesamiento de la segunda entrada sobrescribe la primera en el mapa de resultados temporal, liberando el objeto PHP original mientras su puntero obsoleto permanece en el mapa. Una referencia href posterior al nodo liberado puede copiar el puntero colgante en el resultado. Como las asignaciones de cadenas de PHP pueden reclamar la región de memoria liberada, un atacante con control sobre el cuerpo de la solicitud SOAP puede explotar este uso después de liberación para lograr ejecución remota de código."
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