---
id: CVE-2026-108086
title: 'Apache Cocoon: XEE could lead to SSRF and information disclosure'
summary: "** UNSUPPORTED WHEN ASSIGNED ** Improper restriction of recursive entity references in DTDs ('XML entity expansion') vulnerability in Apache Cocoon.\n\n\n\nThis issue affects Apache Cocoon: all versions. XEE in the\_fp: form processor could l…"
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cvssSource: adp
cwe:
  - CWE-776
vendor: Apache Software Foundation
product: Apache Cocoon
affected:
  - apache_cocoon <= *
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-29T18:17:47.758455Z'
published: '2026-10-20'
updated: '2026-10-29'
sourceUpdated: '2026-10-29T18:19:05.421Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-108086'
references:
  - url: 'https://lists.apache.org/thread/mt0h1cpjzps76nq6op7714rmnq6pbtht'
tags:
  - cve.org
epss: 0.00416
epssPercentile: 0.35922
ingestedAt: '2026-10-20T12:05:07.339Z'
---

## Overview

** UNSUPPORTED WHEN ASSIGNED ** Improper restriction of recursive entity references in DTDs ('XML entity expansion') vulnerability in Apache Cocoon.



This issue affects Apache Cocoon: all versions. XEE in the fp: form processor could lead to SSRF, including exposing files from the server to an untrusted external system



As this project is retired, we do not plan to release a version that fixes this issue. Users are recommended to find an alternative or restrict access to the instance to trusted users.



NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

## Affected

- `apache_cocoon <= *`

## Remediation

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