Vulnerability Description
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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/strapi/strapi
- https://github.com/strapi/strapi/blob/v5.46.0/packages/core/content-manager/admi
- 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.
FAQ
What is CVE-2026-90561?
CVE-2026-90561 is a vulnerability with a CVSS score of 8.7 (HIGH). 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 ...
How severe is CVE-2026-90561?
CVE-2026-90561 has been rated HIGH with a CVSS base score of 8.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-90561?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.