---
id: "CVE-2026-14511"
kind: "vulnerability"
aliases: ["CVE-2026-14511"]
title: "IBM MQ: crafted message from authenticated user crashes consuming applications"
severity: "medium"
cvss: 6.5
epss: null
exploited: false
status: "open"
category: "vendor"
products: [{"name": "ibm mq", "fixed": [], "affected": "= 9.4.5.0", "ecosystem": "vendor"}, {"name": "ibm mq", "fixed": [], "affected": "= 9.4.5.1", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["ibm-mq", "messaging", "queue-consumers", "vendor"]
not_affected_if: ["other-mq-versions"]
published_at: "2026-10-19T17:17:20+00:00"
first_seen_at: "2026-10-23T21:57:18+00:00"
updated_at: "2026-10-25T03:55:46+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-14511", "first_seen_at": "2026-10-23T21:57:18+00:00"}]
---

# IBM MQ: crafted message from authenticated user crashes consuming applications

IBM MQ versions 9.4.5.0 through 9.4.5.1 can be crashed by a specially crafted message sent by an authenticated user. The crash affects applications that consume the message, causing a denial of service.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:ibm mq affected = 9.4.5.0 fixed ?
- vendor:ibm mq affected = 9.4.5.1 fixed ?

## How to check

- Run `dspmqver` on the queue manager host and compare the reported version against `9.4.5.0` and `9.4.5.1`
- unknown for other checks: the sources do not say which configurations expose the consuming applications

## Fix

- Move IBM MQ to a release after `9.4.5.1` as listed in the IBM advisory (fixed version not named in the sources)
- unknown for interim mitigations: the sources do not say

## Timeline

- 2026-10-23T21:57:18+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-14511

## From the sources

IBM MQ 9.4.5.0 through 9.4.5.1 could allow an authenticated user to cause a denial of service by sending a specially crafted message that crashes consuming applications.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_