Integer Overflow Vulnerability in IBM MQ Affects Multiple Versions
CVE-2026-11376

8.8HIGH

Key Information:

Vendor

IBM
Status
MQ
Vendor
CVE Published:
4 November 2026

What is CVE-2026-11376?

The integer overflow vulnerability in IBM MQ allows an authenticated attacker to exploit subscription requests with specially crafted buffer sizes. This could lead to a denial of service or the execution of arbitrary code on the affected systems. The vulnerability exists across several versions of IBM MQ, making it critical for users to apply necessary patches to safeguard their environments.

Affected Version(s)

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

References

https://www.ibm.com/support/pages/node/7294498
vendor-advisorypatch

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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