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CVE-2026-23919

Estado: AnalizadaAlta (7.1)—

For performance reasons Zabbix Server/Proxy reuses JavaScript (Duktape) contexts (used in script items, JavaScript reprocessing, Webhooks). This can lead to confidentiality loss where a regular (non-super) Zabbix administrator leaks data for hosts they do not have access to. A fix has been released that makes the built in Zabbix JavaScript objects read-only, but please be advised that usage of global JavaScript variables is not recommended because their content could be leaked. More information <a href='https://www.zabbix.com/documentation/7.4/en/manual/installation/known_issues#preprocessing-global-variables-are-unsafe'>in Zabbix documentation</a>.

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).

🎯 Técnicas ATT&CK

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

Vulnerabilidad en Zabbix Server/Proxy (red adyacente, AV:A, PR:H) que reutiliza contextos JavaScript, permitiendo a administradores no privilegiados acceder a datos de hosts sin permisos. Lectura no autorizada de información sensible en memoria compartida.

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 ManagementNetwork SegmentationVulnerability ScanningUser Account ManagementThreat Intelligence ProgramLimit Access to Resource Over Network

Tecnologías afectadas (1)

Zabbix — Zabbix

CWE

Referencias

JSON original (NVD)

Mostrar
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          "role": "CISA Coordinator",
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              "exploitation": "none"
            },
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            },
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              "technicalImpact": "partial"
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          "version": "2.0.3",
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          "attackVector": "ADJACENT",
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          "valueDensity": "NOT_DEFINED",
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          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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          "modules": [
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          "versions": [
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              "versionType": "git",
              "lessThanOrEqual": "6.0.41"
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              "lessThanOrEqual": "7.0.18"
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                  "at": "7.2.13",
                  "status": "unaffected"
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              "version": "7.2.0",
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  "published": "2026-03-24T19:16:49.290",
  "references": [
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      "url": "https://support.zabbix.com/browse/ZBX-27638",
      "tags": [
        "Vendor Advisory"
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      "source": "security@zabbix.com",
      "description": [
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          "lang": "en",
          "value": "CWE-488"
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      "lang": "en",
      "value": "For performance reasons Zabbix Server/Proxy reuses JavaScript (Duktape) contexts (used in script items, JavaScript reprocessing, Webhooks). This can lead to confidentiality loss where a regular (non-super) Zabbix administrator leaks data for hosts they do not have access to. A fix has been released that makes the built in Zabbix JavaScript objects read-only, but please be advised that usage of global JavaScript variables is not recommended because their content could be leaked. More information <a href='https://www.zabbix.com/documentation/7.4/en/manual/installation/known_issues#preprocessing-global-variables-are-unsafe'>in Zabbix documentation</a>."
    },
    {
      "lang": "es",
      "value": "Por razones de rendimiento, Zabbix Server/Proxy reutiliza contextos de JavaScript (Duktape) (utilizados en elementos de script, reprocesamiento de JavaScript, Webhooks). Esto puede llevar a una pérdida de confidencialidad donde un administrador de Zabbix regular (no-super) filtra datos de hosts a los que no tiene acceso. Se ha lanzado una corrección que hace que los objetos JavaScript integrados de Zabbix sean de solo lectura, pero tenga en cuenta que el uso de variables globales de JavaScript no está recomendado porque su contenido podría ser filtrado. Más información <a href=\"https://www.zabbix.com/documentation/7.4/en/manual/installation/known_issues#preprocessing-global-variables-are-unsafe\" rel=\"nofollow\">en la documentación de Zabbix</a>."
    }
  ],
  "lastModified": "2026-09-18T17:07:18.850",
  "configurations": [
    {
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