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

影響: npm:ckeditor5 >= 45.0.0, < 47.7.4 → 47.7.4, npm:@ckeditor/ckeditor5-engine >= 45.0.0, < 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 is caused by a prototype pollution issue in the es-toolkit library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming style attribute values. The underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5. Patches The problem has been recognized and…

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「重要」(high) です。関連する技術: JavaScript / Node.js。CVE: CVE-2026-116688。