Vulnerability record · CVE-2026-90561 · published 13 September 2026

CVE-2026-90561: Cross-site scripting vulnerability

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.

9.3 CVSS 4.0 Critical EPSS 0.43% · top 65.3% CWE-79 · Cross-site scripting Awaiting Analysis

9.3CVSS 4.0 base score

0.43%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

5References

24 Sep 2026Last modified by NVD

Description

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

Link	Tags
https://github.com/strapi/strapi
https://github.com/strapi/strapi/blob/v5.46.0/packages/core/content-manager/admin/src/pages/EditView/components/FormInpu
https://github.com/strapi/strapi/commit/875752612c30f951546904a29469e51e17e0ac37
https://github.com/strapi/strapi/issues/26857
https://www.vulncheck.com/advisories/strapi-4-x-through-4.26.2-and-5-x-before-5.48.1-stored-xss-via-wysiwyg

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Source: NIST National Vulnerability Database (record CVE-2026-90561), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.