Vulnerability · Published Sep 20, 2026 · Assigned by VulnCheck

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

High 8.0

In plain English

A high-severity security flaw in openEQUELLA from openequella. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities).

Severity (CVSS 3.1)8.0High

Exploit odds (30 days)0.8%top 43.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
openequella	openEQUELLA	0 – before 2026.1.0

Weakness: CWE-1336 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

References

Researcher Blog technical-description, exploit
Patch Commit patch
openEQUELLA 2026.1.0 Release Notes release-notes
GitHub Security Advisory (GHSA-62g6-mmp6-9wv2) vendor-advisory
VulnCheck Advisory third-party-advisory