CVE-2026-116687
Published:October 27, 2026
Updated:October 28, 2026
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.
Affected Packages
https://github.com/ckeditor/ckeditor5.git (GITHUB):
Affected version(s) >=v47.0.0 <v47.7.4Fix Suggestion:
Update to version v47.7.4https://github.com/ckeditor/ckeditor5.git (GITHUB):
Affected version(s) >=v48.0.0 <v48.5.1Fix Suggestion:
Update to version v48.5.1ckeditor5 (NPM):
Affected version(s) >=47.0.0-alpha.0 <47.7.4Fix Suggestion:
Update to version 47.7.4ckeditor5 (NPM):
Affected version(s) >=48.0.0-alpha.0 <48.5.1Fix Suggestion:
Update to version 48.5.1@ckeditor/ckeditor5-engine (NPM):
Affected version(s) >=47.0.0-alpha.0 <47.7.4Fix Suggestion:
Update to version 47.7.4@ckeditor/ckeditor5-engine (NPM):
Affected version(s) >=48.0.0-alpha.0 <48.5.1Fix Suggestion:
Update to version 48.5.1Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
2.3
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
3.1
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Input During Web Page Generation