CVE-2026-46396: Haxtheweb Haxcms-Node.js

Critical severity, CVSS 9.3. EPSS: 0.4% chance of exploitation in the next 30 days.

HAX CMS helps manage microsite universe with PHP or NodeJs backends. A stored cross-site scripting (XSS) vulnerability exists in versions prior to 26.0.0 due to improper sanitization of `<iframe>` elements. The application allows `javascript:` URIs in the `src` attribute, which are executed when a malicious page is viewed. This enables attackers to execute arbitrary JavaScript in the context of the victim’s browser and access sensitive data exposed to client-side scripts. Version 26.0.0 fixes the issue.

Affected products

• Haxtheweb Haxcms-Node.js: before 26.0.0 (fixed in 26.0.0)
• Haxtheweb Iframe-Loader: before 26.0.0 (fixed in 26.0.0)
• Haxtheweb Video-Player: before 26.0.0 (fixed in 26.0.0)

Published 2026-06-05. Last modified 2026-06-17.