TinyMCE Cross-Site Scripting (XSS) vulnerability using sanitization bypass through nested SVGs

{
  "id": "4d8754a88661c9f4f0b0515eee5678fae0a37cfb660659acc52e40bc48e197ee",
  "url": "https://osv.dev/vulnerability/CVE-2026-47760",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "TinyMCE Cross-Site Scripting (XSS) vulnerability using sanitization bypass through nested SVGs",
    "summary": "TinyMCE is an open source rich text editor. From 6.8.0 to before 7.1.0, TinyMCE contains an XSS vulnerability caused by improper SVG namespace scope handling in the sanitizer. A crafted payload using nested elements can bypass attribute sanitization and execute arbitrary JavaScript. This vulnerability is fixed in 7.1.0.",
    "evidence": "osv:CVE-2026-47760",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-47760",
      "aliases": [
        "CVE-2026-47760",
        "GHSA-mh5m-5hw4-5c69"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/tinymce/tinymce",
              "type": "GIT",
              "events": [
                {
                  "introduced": "4cc623897917472ba418f1378170727d7a94575b"
                },
                {
                  "fixed": "d1f9346bc98acb3cdfe700e6e6fd310f356ef2b8"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "6.0.0"
                      },
                      {
                        "fixed": "7.1.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "cpe": "cpe:2.3:a:tiny:tinymce:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "6.8.0"
                      },
                      {
                        "fixed": "7.1.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-47760.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:43.179457017Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47760.json",
        "https://github.com/tinymce/tinymce/security/advisories/GHSA-mh5m-5hw4-5c69",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-47760"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47760.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-47760",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 510928,
  "published_at": "2026-05-28T15:18:22.509+00:00"
}