---
id: CVE-2026-53917
aliases:
  - GHSA-f77w-px59-cqf5
title: >-
  Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ
  Broker have Memory Allocation with Excessive Size Value vulnerability
summary: >-
  Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ
  Broker have Memory Allocation with Excessive Size Value vulnerability
severity: high
cvss: 7.5
cwe:
  - CWE-789
vendor: apache
product: 'org.apache.activemq:apache-activemq'
ecosystem: maven
affected:
  - 'org.apache.activemq:apache-activemq < 5.19.8'
  - 'org.apache.activemq:apache-activemq >= 6.0.0, < 6.2.7'
  - 'org.apache.activemq:activemq-all < 5.19.8'
  - 'org.apache.activemq:activemq-all >= 6.0.0, < 6.2.7'
  - 'org.apache.activemq:activemq-client < 5.19.8'
  - 'org.apache.activemq:activemq-client >= 6.0.0, < 6.2.7'
  - 'org.apache.activemq:activemq-broker < 5.19.8'
  - 'org.apache.activemq:activemq-broker >= 6.0.0, < 6.2.7'
patched:
  - 'org.apache.activemq:apache-activemq 5.19.8'
  - 'org.apache.activemq:apache-activemq 6.2.7'
  - 'org.apache.activemq:activemq-all 5.19.8'
  - 'org.apache.activemq:activemq-all 6.2.7'
  - 'org.apache.activemq:activemq-client 5.19.8'
  - 'org.apache.activemq:activemq-client 6.2.7'
  - 'org.apache.activemq:activemq-broker 5.19.8'
  - 'org.apache.activemq:activemq-broker 6.2.7'
published: '2026-06-30'
updated: '2026-11-04'
sourceUpdated: '2026-11-04T16:10:29Z'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-f77w-px59-cqf5'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-53917'
  - url: 'https://lists.apache.org/thread/grrd1mwgkgblqjbwkkq6dvmdxd9ov2dx'
  - url: 'http://www.openwall.com/lists/oss-security/2026/06/29/14'
  - url: 'https://github.com/apache/activemq/pull/2136'
  - url: >-
      https://github.com/apache/activemq/commit/78bb8dcdc32e80c8b8813b57f89147572d16a2b9
  - url: >-
      https://github.com/apache/activemq/commit/b20e61c7ef736a04ad07a934ea8de628550c6cf2
  - url: >-
      https://github.com/apache/activemq/commit/ecfd1336fa3f3f6116a78f0ab71d1b2f90bc717f
  - url: 'https://github.com/apache/activemq/releases/tag/activemq-5.19.8'
  - url: 'https://github.com/apache/activemq/releases/tag/activemq-6.2.7'
  - url: 'https://github.com/advisories/GHSA-f77w-px59-cqf5'
tags:
  - ghsa
  - maven
epss: 0.0074
epssPercentile: 0.54658
ingestedAt: '2026-11-04T16:18:35.576Z'
---

## Overview

Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker.

An authenticated user can cause a broker DoS by sending a crafted OpenWire Message with a large encoded size value for the map. OpenWire message property maps are unmarshaled without size validation which can trigger OOM and crash the broker.
This issue affects Apache ActiveMQ: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ All: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ Client: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ Broker: before 5.19.8, from 6.0.0 before 6.2.7.

Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.

## Affected packages

- `org.apache.activemq:apache-activemq < 5.19.8`
- `org.apache.activemq:apache-activemq >= 6.0.0, < 6.2.7`
- `org.apache.activemq:activemq-all < 5.19.8`
- `org.apache.activemq:activemq-all >= 6.0.0, < 6.2.7`
- `org.apache.activemq:activemq-client < 5.19.8`
- `org.apache.activemq:activemq-client >= 6.0.0, < 6.2.7`
- `org.apache.activemq:activemq-broker < 5.19.8`
- `org.apache.activemq:activemq-broker >= 6.0.0, < 6.2.7`

## Remediation

Upgrade to a patched release:

- `org.apache.activemq:apache-activemq 5.19.8`
- `org.apache.activemq:apache-activemq 6.2.7`
- `org.apache.activemq:activemq-all 5.19.8`
- `org.apache.activemq:activemq-all 6.2.7`
- `org.apache.activemq:activemq-client 5.19.8`
- `org.apache.activemq:activemq-client 6.2.7`
- `org.apache.activemq:activemq-broker 5.19.8`
- `org.apache.activemq:activemq-broker 6.2.7`