CVE-2026-53606

{
  "id": "CVE-2026-53606",
  "sourceIdentifier": "[email protected]",
  "published": "2026-06-12T21:16:24.093",
  "lastModified": "2026-10-25T23:10:00.167",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. Versions of sanitize-html prior to 2.17.5 use `allowedSchemesAppliedToAttributes` (default: `['href', 'src', 'cite']`) to gate the `naughtyHref()` function that blocks dangerous URI schemes like `javascript:` and `vbscript:`. The HTML specification defines 10+ attributes that accept URIs (`action`, `formaction`, `data`, `poster`, `background`, `ping`, `xlink:href`, `dynsrc`, `lowsrc`), but none of these are included in the default gate list. When a developer allows any of these attributes in their configuration, `javascript:` URIs pass through completely unmodified, enabling XSS. Version 2.17.5 patches the issue."
    },
    {
      "lang": "es",
      "value": "ApostropheCMS es un sistema de gestión de contenido de código abierto basado en Node.js, y sanitize-html proporciona un saneador de HTML simple con una API clara. Las versiones de sanitize-html anteriores a la 2.17.5 usan ’allowedSchemesAppliedToAttributes’ (predeterminado: ’[’href’, ’src’, ’cite’]’) para controlar la función ’naughtyHref()’ que bloquea esquemas URI peligrosos como ’javascript_disabled: ’ y ’vbscript:’. La especificación HTML define más de 10 atributos que aceptan URIs (’action’, ’formaction’, ’data’, ’poster’, ’background’, ’ping’, ’xlink:href’, ’dynsrc’, ’lowsrc’), pero ninguno de estos está incluido en la lista de control predeterminada. Cuando un desarrollador permite cualquiera de estos atributos en su configuración, los URIs ’javascript_disabled: ’ pasan completamente sin modificar, lo que permite XSS. La versión 2.17.5 corrige el problema."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "apostrophecms",
          "product": "sanitize-html",
          "versions": [
            {
              "version": "< 2.17.5",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "REQUIRED",
          "scope": "CHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.3,
        "impactScore": 2.7
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-06-15T17:54:19.772501Z",
          "id": "CVE-2026-53606",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-vccv-cmxp-4j9h",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-vccv-cmxp-4j9h",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}