CVE-2026-63670

{
  "id": "CVE-2026-63670",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-17T20:16:45.000",
  "lastModified": "2026-10-23T16:10:00.313",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "ApostropheCMS is an open-source Node.js content management system. Prior to 2.17.6, sanitizeHtml() can pass disallowed executable markup through packages/sanitize-html/index.js when textarea or xmp is included in allowedTags because a literal solidus after the raw-text end-tag name is treated as text by htmlparser2 and the ontext handler emits that content without escaping, while a browser parses the following img onerror markup as active HTML. This issue is fixed in version 2.17.6."
    },
    {
      "lang": "es",
      "value": "ApostropheCMS es un sistema de gestión de contenido de código abierto basado en Node.js. Antes de la 2.17.6, sanitizeHtml() puede permitir el paso de marcado ejecutable no permitido a través de packages/sanitize-html/index.js cuando textarea o xmp están incluidos en allowedTags porque una barra sólida literal después del nombre de la etiqueta de cierre de texto sin formato es tratada como texto por htmlparser2 y el gestor ontext emite ese contenido sin escapar, mientras que un navegador analiza el siguiente marcado img onerror como HTML activo. Este problema se ha solucionado en la versión 2.17.6."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "apostrophecms",
          "product": "apostrophe",
          "versions": [
            {
              "version": "< 2.17.6",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "baseScore": 6.1,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "CHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.7
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-18T18:07:52.564054Z",
          "id": "CVE-2026-63670",
          "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/commit/eae1fb2b72ec5d1c27d0977509c6482a0408f725",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/apostrophecms/apostrophe/pull/5501",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-jxwj-j7wr-gfrw",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-jxwj-j7wr-gfrw",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}