---
id: CVE-2026-66089
title: >-
  XML External Entity (XXE) Vulnerability in SOAP Interface Allows External
  Entity Expansion
summary: >-
  In openEQUELLA before 2026.1, the SOAP API parses XML supplied in the stopEdit
  operation with a parser that resolves external entities. This allows an
  attacker to read arbitrary files accessible to the openEQUELLA service or
  cause the se…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:L/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-611
vendor: Apereo Foundation
product: openEQUELLA
affected:
  - openEQUELLA < 2026.1
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-29T01:50:41.667300Z'
published: '2026-10-29'
updated: '2026-10-29'
sourceUpdated: '2026-10-29T02:02:13.415Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-66089'
references:
  - url: >-
      https://github.com/openequella/openEQUELLA/security/advisories/GHSA-f9wv-5rpf-rq45
  - url: 'https://openequella.github.io/guides/'
tags:
  - cve.org
epss: 0.00269
epssPercentile: 0.1916
ingestedAt: '2026-10-31T01:14:13.031Z'
---

## Overview

In openEQUELLA before 2026.1, the SOAP API parses XML supplied in the stopEdit operation with a parser that resolves external entities. This allows an attacker to read arbitrary files accessible to the openEQUELLA service or cause the server to issue requests to attacker-specified locations (SSRF).

## Affected

- `openEQUELLA < 2026.1`

## Remediation

Upgrade to the vendor recommended fixed versions