Denial of Service Vulnerability in IBM MQ Affecting Authenticated Users
CVE-2026-12670

5.3MEDIUM

Key Information:

Vendor

IBM
Status
MQ Operator
MQ Advanced Container Images
Vendor
CVE Published:
19 October 2026

What is CVE-2026-12670?

A vulnerability in IBM MQ allows an authenticated attacker to launch a denial of service attack by sending specially crafted messages. This exploitation leads to excessive memory operations during character set conversion, potentially disrupting service availability and impacting system performance.

Affected Version(s)

MQ Advanced container images 9.4.0.6-r1

MQ Advanced container images 9.4.0.6-r2

MQ Advanced container images 9.4.0.7-r1

References

https://www.ibm.com/support/pages/node/7292667
vendor-advisorypatch

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.