CVE-2026-90561

EUVD-2026-76986
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.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
8.7 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
strapistrapi
4.0.0 ≤
𝑥
≤ 4.26.2
CNA
strapistrapi
5.0.0 ≤
𝑥
< 5.48.1
CNA
Common Weakness Enumeration
References
https://github.com/strapi/strapi
https://github.com/strapi/strapi/blob/v5.46.0/packages/core/content-manager/admin/src/pages/EditView/components/FormInputs/Wysiwyg/PreviewWysiwyg.tsx
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