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7.0

IBM MQ can be stopped by a crafted TLS certificate

CVE-2026-12150 · published 1 month ago
Summary

Certain versions of IBM MQ may crash or misbehave if they receive a specially crafted TLS client certificate. An attacker who can present a trusted certificate could cause the queue manager to stop working and possibly expose memory data. Update to a newer IBM MQ release or apply the vendor’s patch to fix the certificate handling.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
ibm mq <= 9.1.0.37 LTS
Original advisory text
IBM MQ queue manager is vulnerable to denial of service
IBM MQ 9.1.0.0 through 9.1.0.37 LTS, 9.2.0.0 through 9.2.0.43 LTS, 9.3.0.0 through 9.3.0.41 LTS, 9.3.0.0 through 9.3.5.1 CD, 9.4.0.0 through 9.4.0.25 LTS, 9.4.0.0 through 9.4.5.1 CD, and 10.0.0.0 could allow a remote attacker with a trusted TLS client certificate to cause a denial of service and potentially affect memory contents due to improper validation of deeply nested certificate data during TLS certificate processing.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
7.0 High
Exploitation
<1% chance of attack within 30 days
Type
CWE-121Stack-based Buffer Overflow
Timeline
Published15 Sep 2026
Updated4 Nov 2026
First seen15 Sep 2026
Sources
CVE-2026-12150 · NVD
CVE-2026-12150 · MITRE
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