---
title: "CVE-2026-10743: IBM MQ - Denial of Service"
description: "IBM MQ contains a denial of service caused by improper validation of buffer sizes in MQOPEN operations, letting authenticated attackers cause service disruption or memory corruption, exploit requires authentication."
url: https://panop.io/threat-heartbeat/CVE-2026-10743/
---

# CVE-2026-10743 IBM MQ - Denial of Service

IBM MQ contains a denial of service caused by improper validation of buffer sizes in MQOPEN operations, letting authenticated attackers cause service disruption or memory corruption, exploit requires authentication.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-10743)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Published

19 October 2026

Updated

20 October 2026

Weakness

[CWE-1223](https://cwe.mitre.org/data/definitions/1223.html)

## Vendor fix

Update to the latest version of IBM MQ.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-10743](https://nvd.nist.gov/vuln/detail/CVE-2026-10743)
- [https://www.ibm.com/support/pages/node/7292667](https://www.ibm.com/support/pages/node/7292667)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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