CKEditor: Cross-site scripting (XSS) in the engine package

{
  "id": "8b2211073c03aaa10e270f27c7eb3dc7815b233bd8c7dfa11ef8e41ab3e8023b",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-116687",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CKEditor: Cross-site scripting (XSS) in the engine package",
    "summary": "CKEditor 5 is a modern JavaScript rich-text editor with an MVC architecture. From 29.0.0 until 47.7.4 and 48.5.1, specially crafted markup can trigger cross-site scripting when General HTML Support is enabled and specifically configured to allow object content. Processing that content can execute attacker-controlled JavaScript in a browser context isolated from the origin of the application embedding the editor. This issue is fixed in versions 47.7.4 and 48.5.1.",
    "evidence": "cve:CVE-2026-116687",
    "products": [
      {
        "name": {
          "value": "ckeditor5",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-116687",
      "aliases": [
        "CVE-2026-116687"
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "scope": "UNCHANGED",
            "version": "3.1",
            "baseScore": 3.1,
            "attackVector": "NETWORK",
            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N",
            "integrityImpact": "LOW",
            "userInteraction": "NONE",
            "attackComplexity": "HIGH",
            "availabilityImpact": "NONE",
            "privilegesRequired": "LOW",
            "confidentialityImpact": "NONE"
          }
        }
      ],
      "affected": [
        {
          "vendor": "ckeditor",
          "product": "ckeditor5",
          "versions": [
            {
              "status": "affected",
              "version": ">= 29.0.0, < 47.7.4"
            },
            {
              "status": "affected",
              "version": ">= 48.0.0, < 48.5.1"
            }
          ]
        }
      ],
      "modified": "2026-10-27T19:33:11.074Z",
      "provider": "cve",
      "references": [
        "https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-v6mg-96c6-gmpq",
        "https://github.com/ckeditor/ckeditor5/commit/4d9c5bb34f63cd956d15ccafbe584e14280c86a0",
        "https://github.com/ckeditor/ckeditor5/commit/a750e38635db6a18c5b11599c09f4fd702850423",
        "https://github.com/ckeditor/ckeditor5/releases/tag/v47.7.4",
        "https://github.com/ckeditor/ckeditor5/releases/tag/v48.5.1"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
          "shortName": "GitHub_M",
          "dateUpdated": "2026-10-27T19:33:11.074Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-116687",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 398113,
  "published_at": "2026-10-27T19:33:11.074+00:00"
}