---
id: CVE-2026-18142
title: IBM MQ is affected by a denial of service vulnerability
summary: >-
  IBM MQ 9.2.0.0 through 9.2.0.44 LTS, 9.3.0.0 through 9.3.0.42 LTS, 9.4.0.0
  through 9.4.0.26 LTS, 9.4.0.0 through 9.4.5.1 CD, and 10.0.0.0 through
  10.0.0.5 LTS and CD could allow a remote authenticated attacker to cause a
  denial of servic…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H'
cvssSource: cna
cwe:
  - CWE-190
vendor: IBM
product: MQ
affected:
  - MQ >= 9.2.0.0 <= 9.2.0.44
  - MQ >= 9.3.0.0 <= 9.3.0.42
  - MQ >= 9.4.0.0 <= 9.4.0.26
  - MQ >= 9.4.0.0 <= 9.4.5.1
  - MQ >= 10.0.0.0 <= 10.0.0.5
published: '2026-11-04'
updated: '2026-11-04'
sourceUpdated: '2026-11-04T20:21:55.509Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-18142'
references:
  - url: 'https://www.ibm.com/support/pages/node/7294663'
tags:
  - cve.org
ingestedAt: '2026-11-05T21:36:00.547Z'
epss: 0.00427
epssPercentile: 0.37201
---

## Overview

IBM MQ 9.2.0.0 through 9.2.0.44 LTS, 9.3.0.0 through 9.3.0.42 LTS, 9.4.0.0 through 9.4.0.26 LTS, 9.4.0.0 through 9.4.5.1 CD, and 10.0.0.0 through 10.0.0.5 LTS and CD could allow a remote authenticated attacker to cause a denial of service and perform limited memory corruption due to an integer overflow.

## Affected

- `MQ >= 9.2.0.0 <= 9.2.0.44`
- `MQ >= 9.3.0.0 <= 9.3.0.42`
- `MQ >= 9.4.0.0 <= 9.4.0.26`
- `MQ >= 9.4.0.0 <= 9.4.5.1`
- `MQ >= 10.0.0.0 <= 10.0.0.5`

## Remediation

This issue was addressed under Known Issue DT500561.



IBM MQ version 9.2 LTS



 Apply cumulative security update 9.2.0.46 https://www.ibm.com/support/pages/downloading-ibm-mq-92-lts 



IBM MQ version 9.3 LTS



 Apply cumulative security update 9.3.0.43 https://www.ibm.com/support/pages/downloading-ibm-mq-93-lts 



IBM MQ version 9.4 LTS



 Apply fix pack 9.4.0.30 https://www.ibm.com/support/pages/downloading-ibm-mq-94 



IBM MQ version 10.0.LTS



 Upgrade to IBM MQ version 10.0.0.6 https://www.ibm.com/support/pages/downloading-ibm-mq-100 



IBM MQ version 9.4 CD and 10.0 CD



 Upgrade to IBM MQ version 10.0.1.0 https://www.ibm.com/support/pages/downloading-ibm-mq-100