CVE-2026-94109: Openequella

High severity, CVSS 8.0. EPSS: 0.8% chance of exploitation in the next 30 days.

openEQUELLA before 2026.1.0 contains an authenticated stored server-side template injection vulnerability in FreemarkerPortletRenderer.renderHtml() that allows any authenticated non-guest user to achieve remote code execution by storing a malicious FreeMarker payload through a POST request to the RemotePortletService invoker endpoint. The markup field from stored portlet configuration is passed directly to custFactory.createResult() without a TemplateClassResolver restriction or FreeMarker sandboxing in BasicConfiguration, leaving built-ins such as ?new and freemarker.template.utility.Execute available, causing the payload to execute in the application server process context when any user renders a dashboard containing the affected portlet.

Affected products

• Openequella Openequella: before 2026.1.0 (fixed in 2026.1.0)

Published 2026-09-20. Last modified 2026-09-24.