{"id":"CVE-2026-90561","summary":"Strapi 4.x through 4.26.2 and 5.x before 5.48.1 Stored XSS via WYSIWYG","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.","modified":"2026-09-15T03:48:24.937548870Z","published":"2026-09-13T10:45:35.988Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90561.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-79"]},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/strapi/strapi","events":[{"introduced":"b181702f0202b2c6d645d42b195a831f25cd0b03"},{"last_affected":"7ad165f89d1ccae3c524439a36fc619ecf6b23f9"},{"introduced":"ce84fada19d58a7dfbdd553035e6558f8befcba4"},{"fixed":"b1e707d60def66aa840ad29db1a15f2ca574c154"}],"database_specific":{"extracted_events":[{"introduced":"4.0.0"},{"last_affected":"4.26.2"},{"introduced":"5.0.0"},{"fixed":"5.48.1"}],"source":"AFFECTED_FIELD"}}],"versions":["v5.31.0","v5.24.1","v5.14.0","v4.25.22","v4.25.16","v5.0.4","v5.0.2-beta.0","v5.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90561.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","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"}]}