---
id: CVE-2026-115721
title: 'Apache Vysper: Unbounded allocation'
summary: "**UNSUPPORTED WHEN ASSIGNED**\_\_Unbounded allocation in XML parsing in Apache Vysper; all versions, may lead to an out of memory condition.\n\n\n\n\nThis issue affects all versions of Apache Vysper.\_Apache Vysper is an XMPP (Jabber) server lib…"
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
vendor: Apache Software Foundation
product: 'org.apache.vysper:vysper'
affected:
  - 'org.apache.vysper:vysper <= *'
published: '2026-10-26'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T15:01:29.549Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-115721'
references:
  - url: 'https://mina.apache.org/vysper-project/'
  - url: 'https://lists.apache.org/thread.html/d0bx15hjcs69gktk9tt25vgvk121c9vm'
tags:
  - cve.org
ingestedAt: '2026-10-26T15:29:30.501Z'
---

## Overview

**UNSUPPORTED WHEN ASSIGNED**  Unbounded allocation in XML parsing in Apache Vysper; all versions, may lead to an out of memory condition.




This issue affects all versions of Apache Vysper. Apache Vysper is an XMPP (Jabber) server library.




As this project is retired, we do not plan to release a version that fixes this issue. Users are recommended to find an alternative.

## Affected

- `org.apache.vysper:vysper <= *`

## Remediation

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