CVE-2026-88976: Udecode Plate

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

Plate is a rich-text editor with AI and shadcn/ui. Prior to 53.3.11, and in the discontinued 54.0.0-beta.0 through 54.0.0-beta.1 builds, Plate core HTML deserialization APIs parse supplied HTML strings in the active document. When an application passes untrusted or cross-user HTML to these APIs, certain HTML attributes can trigger browser behavior before the HTML is converted into editor nodes. This can allow attacker-controlled script to execute in the consuming application's origin when another user loads the deserialized content. This issue is fixed in version 53.3.11.

Affected products

• Udecode Plate: before 53.3.11 (fixed in 53.3.11); from 54.0.0-beta.0, up to and including 54.0.0-beta.1

Published 2026-09-16. Last modified 2026-09-16.