What’s Vulnerable › Vulnerabilities

CVE-2026-94109: openEQUELLA < 2026.1.0 Authenticated Stored SSTI via FreemarkerPortletRenderer

• Severity: high (CVSS 8.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-20 · updated 2026-10-29
• Weakness: CWE-1336

Description

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: before 2026.1.0 — fixed in 2026.1.0

How to fix

Upgrade to a fixed version: openEQUELLA 2026.1.0. Check the vendor advisory for mitigations.

References

• https://blog.evan.lat/posts/openeq
• https://github.com/openequella/openEQUELLA/commit/d6e165afc986f8a3ed912cdb367d5ad8c1eeab5c
• https://github.com/openequella/openEQUELLA/releases/tag/2026.1.0
• https://github.com/openequella/openEQUELLA/security/advisories/GHSA-62g6-mmp6-9wv2
• https://www.vulncheck.com/advisories/openequella-authenticated-stored-ssti-via-freemarkerportletrenderer

Get alerted when CVE-2026-94109 or the next vulnerability affects your stack