Information Disclosure and Denial of Service in IBM MQ
CVE-2026-12550

5.4MEDIUM

Key Information:

Vendor

IBM
Status
MQ
Vendor
CVE Published:
4 November 2026

What is CVE-2026-12550?

An issue within IBM MQ allows an authenticated attacker to exploit improper validation of message selection parameters. This could lead to sensitive information being disclosed or result in a denial of service, compromising the overall integrity of the messaging service.

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/7294502
vendor-advisorypatch

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.