CVE-2026-94109

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.

CVSS 4.0

8.6CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

8.0CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

EPSS

0.8% chance of exploitation in the next 30 days; higher than 55% of CVEs (scores of 2026-10-28)

CWE

CWE-1336

Published

2026-09-20

Modified

2026-10-29

Record from

the NVD, synced 2026-10-29

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

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