Heap Overflow Vulnerability in IBM MQ Affecting Multiple Versions
CVE-2026-11728

8.1HIGH

Key Information:

Vendor

IBM
Status
MQ
Vendor
CVE Published:
15 September 2026

What is CVE-2026-11728?

A vulnerability in IBM MQ allows remote attackers to exploit a heap buffer overflow, which can occur when the software receives messages from a malicious queue manager. This exploit presents a risk of denial of service or arbitrary code execution due to improper handling of message data. The affected versions range across several releases of IBM MQ, emphasizing the importance of timely updates and patches to safeguard against potential attacks. Users are advised to review the security advisory and apply the relevant patches.

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/7284943
vendor-advisorypatch

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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