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HIGH

CVE-2026-90561

Strapi 4.x through 4.26.2 and 5.x before 5.48.1 Stored XSS via WYSIWYG

CVSS v3

8.7

HIGH

EPSS Score

0.4 %

exploit probability, as of 2026-09-28

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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.

Technical details

Published
2026-09-13
Last Modified
2026-09-13

Frequently asked questions

What is CVE-2026-90561?

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.

Is CVE-2026-90561 actively exploited?

Active exploitation of CVE-2026-90561 has not been confirmed. Its EPSS score was 0.4% on 2026-09-28, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-90561?

CVE-2026-90561 has a CVSS v3 base score of 8.7 (HIGH severity).

Is CVE-2026-90561 affecting your environment?

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