CVE-2026-116687: CKEditor: Cross-site scripting (XSS) in the engine package

CVE-2026-116687 · Severity: low · CVSS 3.1 · Published 2026-10-27

CKEditor 5 is a modern JavaScript rich-text editor with an MVC architecture. From 29.0.0 until 47.7.4 and 48.5.1, specially crafted markup can trigger cross-site scripting when General HTML Support is enabled and specifically configured to allow object content. Processing that content can execute attacker-controlled JavaScript in a browser context isolated from the origin of the application embedding the editor. This issue is fixed in versions 47.7.4 and 48.5.1.

Technologies: ckeditor5 (npm). Vendors: npm.

Quick answers

Is CVE-2026-116687 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-116687 being exploited in the wild.
How severe is CVE-2026-116687?
Low severity, with a CVSS score of 3.1, published 27 October 2026.
Which products and versions are affected?
@ckeditor/ckeditor5-engine (npm) >= 29.0.0, < 47.7.4, SEMVER:introduced=29.0.0,fixed=47.7.4; ckeditor5 (npm) >= 29.0.0, < 47.7.4, SEMVER:introduced=29.0.0,fixed=47.7.4.
Is there a fix for CVE-2026-116687?
Yes. @ckeditor/ckeditor5-engine (npm): upgrade to 47.7.4 or later; ckeditor5 (npm): upgrade to 47.7.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-116687?
Check whether you run @ckeditor/ckeditor5-engine (npm) or ckeditor5 (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • @ckeditor/ckeditor5-engine (npm): upgrade to 47.7.4 or later
    npm install @ckeditor/ckeditor5-engine@47.7.4
  • ckeditor5 (npm): upgrade to 47.7.4 or later
    npm install ckeditor5@47.7.4

Affected products

  • @ckeditor/ckeditor5-engine (npm) >= 29.0.0, < 47.7.4, SEMVER:introduced=29.0.0,fixed=47.7.4
  • ckeditor5 (npm) >= 29.0.0, < 47.7.4, SEMVER:introduced=29.0.0,fixed=47.7.4

Identifiers

  • CVE-2026-116687
  • GHSA-v6mg-96c6-gmpq

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