---
id: CVE-2026-94109
title: >-
  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 …
summary: >-
  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 …
severity: high
cvss: 8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-1336
vendor: openequella
product: openEQUELLA
affected:
  - openEQUELLA < 2026.1.0
published: '2026-09-20'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T12:17:13.817'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-94109'
references:
  - url: 'https://blog.evan.lat/posts/openeq'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/openequella/openEQUELLA/commit/d6e165afc986f8a3ed912cdb367d5ad8c1eeab5c
    label: disclosure@vulncheck.com
  - url: 'https://github.com/openequella/openEQUELLA/releases/tag/2026.1.0'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/openequella-authenticated-stored-ssti-via-freemarkerportletrenderer
    label: disclosure@vulncheck.com
  - url: 'https://github.com/openequella/openEQUELLA'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/openequella/openEQUELLA/blob/8bd24b1dcf26cc3d74757e6b982fc1971a7d6767/Source/Plugins/Core/com.equella.core/src/com/tle/core/entity/service/impl/AbstractEntityServiceImpl.java#L230-L250
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/openequella/openEQUELLA/blob/8bd24b1dcf26cc3d74757e6b982fc1971a7d6767/Source/Plugins/Core/com.equella.core/src/com/tle/web/freemarker/BasicConfiguration.java
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/openequella/openEQUELLA/blob/8bd24b1dcf26cc3d74757e6b982fc1971a7d6767/Source/Plugins/Core/com.equella.core/src/com/tle/web/portal/standard/renderer/FreemarkerPortletRenderer.java#L141-L170
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/openequella-before-2026.1.0-remote-code-execution-via-freemarker-template-injection
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/openequella/openEQUELLA/security/advisories/GHSA-62g6-mmp6-9wv2
    label: GitHub Security Advisory (GHSA-62g6-mmp6-9wv2)
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-24T11:57:50.540958Z'
epss: 0.00778
epssPercentile: 0.55674
ingestedAt: '2026-09-20T12:21:05.902Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.