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CVE-2026-1439

Estado: AnalizadaMedia (5.3)—

Reflected Cross-Site Scripting (XSS) vulnerability in the Graylog Web Interface console, version 2.2.3, caused by a lack of proper sanitization and escaping in HTML output. Several endpoints include segments of the URL directly in the response without applying output encoding, allowing an attacker to inject and execute arbitrary JavaScript code when a user visits a specially crafted URL. Exploitation of this vulnerability may allow script execution in the victim's browser and limited manipulation of the affected user's session context, through the  '/

alerts

/' endpoint.

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)

Graylog — Graylog

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-1439",
  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2026-1439",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-02-18T14:15:28.375329Z"
        }
      }
    ],
    "cvssMetricV31": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "CHANGED",
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          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.7,
        "exploitabilityScore": 2.8
      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "cve-coordination@incibe.es",
        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
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          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "valueDensity": "NOT_DEFINED",
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          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
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          "vulnAvailabilityImpact": "NONE",
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          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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      "affectedData": [
        {
          "vendor": "Graylog",
          "product": "Graylog Web Interface",
          "versions": [
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              "version": "2.2.3"
            }
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  "published": "2026-02-18T14:16:06.290",
  "references": [
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      "url": "https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-graylog",
      "tags": [
        "Third Party Advisory"
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  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "cve-coordination@incibe.es",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Reflected Cross-Site Scripting (XSS) vulnerability in the Graylog Web Interface console, version 2.2.3, caused by a lack of proper sanitization and escaping in HTML output. Several endpoints include segments of the URL directly in the response without applying output encoding, allowing an attacker to inject and execute arbitrary JavaScript code when a user visits a specially crafted URL. Exploitation of this vulnerability may allow script execution in the victim's browser and limited manipulation of the affected user's session context, through the  '/\n\nalerts\n\n/' endpoint."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de cross-site scripting (XSS) reflejado en la consola de la interfaz web de Graylog, versión 2.2.3, causada por una falta de sanitización y escape adecuados en la salida HTML. Varios endpoints incluyen segmentos de la URL directamente en la respuesta sin aplicar codificación de salida, permitiendo a un atacante inyectar y ejecutar código JavaScript arbitrario cuando un usuario visita una URL especialmente diseñada. La explotación de esta vulnerabilidad puede permitir la ejecución de scripts en el navegador de la víctima y la manipulación limitada del contexto de la sesión del usuario afectado, a través del endpoint '/alerts/'."
    }
  ],
  "lastModified": "2026-06-17T10:15:47.497",
  "configurations": [
    {
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        {
          "negate": false,
          "cpeMatch": [
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}