CVE-2026-94109

high

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.

References

https://github.com/openequella/openEQUELLA/security/advisories/GHSA-62g6-mmp6-9wv2

https://blog.evan.lat/posts/openeq

https://www.vulncheck.com/advisories/openequella-authenticated-stored-ssti-via-freemarkerportletrenderer

https://github.com/openequella/openEQUELLA/releases/tag/2026.1.0

https://github.com/openequella/openEQUELLA/commit/d6e165afc986f8a3ed912cdb367d5ad8c1eeab5c

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-83731

Details

Source: Mitre, NVD

Published: 2026-09-20

Updated: 2026-10-29

Risk Information

CVSS v2

Base Score: 9

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 8

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

Severity: High

CVSS v4

Base Score: 8.6

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

Severity: High

EPSS

EPSS: 0.00778