{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "4.0.0"
              },
              {
                "last_affected": "4.26.2"
              },
              {
                "introduced": "5.0.0"
              },
              {
                "fixed": "5.48.1"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "b181702f0202b2c6d645d42b195a831f25cd0b03"
            },
            {
              "last_affected": "7ad165f89d1ccae3c524439a36fc619ecf6b23f9"
            },
            {
              "introduced": "ce84fada19d58a7dfbdd553035e6558f8befcba4"
            },
            {
              "fixed": "b1e707d60def66aa840ad29db1a15f2ca574c154"
            }
          ],
          "repo": "https://github.com/strapi/strapi",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90561.json"
  },
  "details": "Strapi versions 4.x through 4.26.2 and 5.x before 5.48.1 contain a stored cross-site scripting vulnerability in the content manager WYSIWYG preview component that fails to strip script tags from rich text. An Author-role user can store malicious script tags in rich text fields that execute in an Editor or Super Admin's session when the preview pane is expanded, enabling account takeover.",
  "id": "CVE-2026-90561",
  "modified": "2026-09-15T03:30:42.660014745Z",
  "published": "2026-09-13T10:45:35.988Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90561.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90561"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/strapi-4-x-through-4.26.2-and-5-x-before-5.48.1-stored-xss-via-wysiwyg"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/strapi/strapi/issues/26857"
    },
    {
      "type": "FIX",
      "url": "https://github.com/strapi/strapi/commit/875752612c30f951546904a29469e51e17e0ac37"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/strapi/strapi"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/strapi/strapi/blob/v5.46.0/packages/core/content-manager/admin/src/pages/EditView/components/FormInputs/Wysiwyg/PreviewWysiwyg.tsx"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Strapi 4.x through 4.26.2 and 5.x before 5.48.1 Stored XSS via WYSIWYG"
}