Project: 
Extended HTML Filter
Project machine name: 
extended_html_filter
Date: 
2026-November-04
Security risk: 
Moderately critical 14 ∕ 25 AC:Basic/A:User/CI:Some/II:Some/E:Theoretical/TD:All
Vulnerability: 
Cross-site scripting
Affected versions: 
<1.0.4
CVE IDs: 
CVE-2026-122078
Description: 

The Extended HTML Filter module allows using style attributes in CKEditor.

The module XSS filter does not sufficiently sanitize certain HTMX attributes, which can lead to a cross-site scripting (XSS) vulnerability.

The vulnerability is mitigated by the fact an attacker must be able to insert HTML with specific attributes.

Solution: 

Install the latest version:

Reported By: 
Fixed By: 
Coordinated By: