CVE-2026-90561: Strapi

High severity, CVSS 8.7. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Strapi Strapi: from 4.0.0, up to and including 4.26.2; from 5.0.0, before 5.48.1 (fixed in 5.48.1)

Published 2026-09-13. Last modified 2026-09-24.