Cross-site Scripting (XSS) Affecting @ckeditor/ckeditor5-engine package, versions >=45.0.0 <47.7.4>=48.0.0 <48.5.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published27 Oct 2026
- disclosed27 Oct 2026
- creditUnknown
Introduced: 27 Oct 2026
NewCVE-2026-116688 (opens in a new tab)How to fix?
Upgrade @ckeditor/ckeditor5-engine to version 47.7.4, 48.5.1 or higher.
Overview
@ckeditor/ckeditor5-engine is a The editing engine of CKEditor 5 – the best browser-based rich text editor.
Affected versions of this package are vulnerable to Cross-site Scripting (XSS).
via the _checkShouldRenderAttribute method in domconverter.ts, where the sanitization regex used to strip whitespace before checking for dangerous URI schemes (such as javascript: or data:image/svg) fails to account for null bytes and other control characters (U+0000–U+0020). An authenticated attacker can inject a payload containing these characters to bypass the filter and execute arbitrary JavaScript in the victim's browser.