---
id: CVE-2026-13271
title: IBM MQ Managed File Transfer 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 Managed File Transfer could allow an authenticated
  attacker to obtain s…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'
cvssSource: cna
cwe:
  - CWE-611
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: '2026-11-04T20:25:20.726Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-13271'
references:
  - url: 'https://www.ibm.com/support/pages/node/7294654'
tags:
  - cve.org
ingestedAt: '2026-11-05T21:36:00.553Z'
epss: 0.00229
epssPercentile: 0.13716
---

## 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 Managed File Transfer could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to improper restriction of XML external entity references in command queue processing.

## 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 DT474627.



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