Integer Overflow Vulnerability in IBM MQ Affects Distribution List Processing
CVE-2026-11378

8.8HIGH

Key Information:

Vendor

IBM
Status
MQ
Vendor
CVE Published:
18 September 2026

What is CVE-2026-11378?

IBM MQ has a vulnerability that allows authenticated attackers to exploit an integer overflow condition in the distribution list processing. This flaw could result in denial of service or enable the execution of arbitrary code, posing significant risks to affected installations. IBM has issued a patch to address this security issue. For more details and guidance on remediation, refer to the vendor advisory.

Affected Version(s)

MQ 9.1.0.0 <= 9.1.0.37 LTS

MQ 9.2.0.0 <= 9.2.0.43 LTS

MQ 9.3.0.0 <= 9.3.0.41 LTS

References

https://www.ibm.com/support/pages/node/7284945
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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