---
id: CVE-2026-11376
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 an authenticated attacker to cause a denial of
  service or p…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-11-06T04:56:24.901512Z'
published: '2026-11-04'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T11:37:33.005Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-11376'
references:
  - url: 'https://www.ibm.com/support/pages/node/7294498'
tags:
  - cve.org
epss: 0.00328
epssPercentile: 0.26088
ingestedAt: '2026-11-05T21:36:00.555Z'
---

## 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 an authenticated attacker to cause a denial of service or potentially execute arbitrary code due to an integer overflow when processing subscription requests with crafted buffer size values.

## 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 DT473422.



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