CKEditor: Cross-site scripting (XSS) in the engine package

影響: npm:ckeditor5 >= 29.0.0, < 47.7.4 → 47.7.4, npm:@ckeditor/ckeditor5-engine >= 29.0.0, < 47.7.4 → 47.7.4, npm:ckeditor5 >= 48.0.0, < 48.5.1 → 48.5.1, npm:@ckeditor/ckeditor5-engine >= 48.0.0, < 48.5.1 → 48.5.1

A Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability could be triggered by inserting specially crafted markup under a specific General HTML Support configuration that allows inserting objects, leading to unauthorized JavaScript code execution in a browser context isolated from the origin of the application embedding the editor. This vulnerability affects only installations where General HTML Support is enabled and configured to allow the af…

GitHub Advisory Databaseで読む

2026/10/28 06:05、GitHub Advisory Databaseが「CKEditor: Cross-site scripting (XSS) in the engine package」を公開しました (種別: 脆弱性アドバイザリ)。重大度は「注意」(low) です。関連する技術: JavaScript / Node.js。CVE: CVE-2026-116687。