High severity · published Sep 15, 2026
CVE-2026-12150
IBM MQ queue manager is vulnerable to denial of service
7.0
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 12% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MQ
MQ · IBM
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; +1 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-12150
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-12150
www.ibm.com
https://www.ibm.com/support/pages/node/7284911
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