---
id: CVE-2026-66090
title: >-
  XML External Entity (XXE) Injection in Metadata Field Allows Arbitrary File
  Read
summary: >-
  In openEQUELLA before 2026.1, the XML parser used for item metadata does not
  disable external entity resolution. A user permitted to create items
  (CREATE_ITEM) can submit crafted XML to POST /api/item and cause the server to
  read arbitra…
severity: high
cvss: 7.1
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/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: '2026-10-29T01:50:31.628692Z'
published: '2026-10-29'
updated: '2026-10-29'
sourceUpdated: '2026-10-29T02:02:13.278Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-66090'
references:
  - url: >-
      https://github.com/openequella/openEQUELLA/security/advisories/GHSA-668q-3hpr-6c96
  - url: 'https://openequella.github.io/guides/'
tags:
  - cve.org
epss: 0.00269
epssPercentile: 0.1916
ingestedAt: '2026-10-31T01:14:13.027Z'
---

## Overview

In openEQUELLA before 2026.1, the XML parser used for item metadata does not disable external entity resolution. A user permitted to create items (CREATE_ITEM) can submit crafted XML to POST /api/item and cause the server to read arbitrary files accessible to the openEQUELLA service, or make requests to attacker-specified locations (SSRF), including cloud instance metadata services.

## Affected

- `openEQUELLA < 2026.1`

## Remediation

Update to vendor recommended versions