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CVE-2026-91999

Estado: AnalizadaMedia (6.1)—

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Apache Sling XSS.

This issue affects Apache Sling XSS: before 2.4.12.

Users are recommended to upgrade to version 2.4.12, which fixes the issue.

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.

CWE-79 XSS en Apache Sling con AV:N y UI:R permite inyectar scripts en navegadores (T1189). Impacto potencial: ejecución de JavaScript del cliente (T1059.007) y lectura de datos de sesión/DOM (T1005).

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

Restrict Web-Based ContentUser TrainingExecution PreventionBehavior Prevention on EndpointDisable or Remove Feature or ProgramApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Apache — Sling XSS Protection API

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-91999",
  "cveTags": [],
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          "id": "CVE-2026-91999",
          "role": "CISA Coordinator",
          "options": [
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          "version": "2.0.3",
          "timestamp": "2026-09-23T14:05:07.662459Z"
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          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
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      "affectedData": [
        {
          "vendor": "Apache Software Foundation",
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          "versions": [
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  "published": "2026-09-23T10:17:08.200",
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    }
  ],
  "lastModified": "2026-09-30T16:11:12.213",
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