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8.8 High

CVE-2026-11376 IBM MQ is affected by a denial of service vulnerability

Description

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.

CVSS 3.1 detail

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

Exploitable remotely over the network, with an ordinary account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector
Network
Attack complexity
Low
Privileges required
Low
Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Affected products and versions

Product Affected versions Fixed in
MQ 10.0 10.0.0.0 → 10.0.0.5 No fix stated
MQ 9.4 9.4.0.0 → 9.4.5.1 No fix stated
MQ 9.3 9.3.0.0 → 9.3.0.42 No fix stated
MQ 9.2 9.2.0.0 → 9.2.0.44 No fix stated

Other CVEs of MQ

The 117 CVEs of MQ →
CVE-2026-10859 IBM MQ XMS .NET client is affected by an arbitrary code execution vulnerability 7.5 High CVE-2026-11724 IBM MQ Managed File Transfer is affected by an arbitrary code execution vulnerability 8.5 High CVE-2026-12356 IBM MQ Managed File Transfer is affected by an arbitrary code execution vulnerability 7.5 High CVE-2026-12550 IBM MQ is affected by a denial of service vulnerability 5.4 Medium
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