CVE-2026-48527: Haxtheweb Haxcms-Node.js

High severity, CVSS 8.7. EPSS: 0.4% chance of exploitation in the next 30 days.

HAX CMS helps manage microsite universe with PHP or NodeJs backends. Versions up to and including 26.0.0 are affected by a stored cross-site scripting (XSS) vulnerability in the `/system/api/saveNode` endpoint. An authenticated user with a permission to edit pages can bypass the HTML sanitizer by injecting an event handler attribute without whitespace before the attribute name. @haxtheweb/haxcms-nodejs 26.0.1 and haxcms-php 26.0.2 patch the issue.

Affected products

• Haxtheweb Haxcms-Node.js: before 26.0.1 (fixed in 26.0.1)
• Haxtheweb Haxcms-PHP: before 26.0.2 (fixed in 26.0.2)

Published 2026-05-29. Last modified 2026-07-21.