CVE-2026-12148 IBM MQ Operator - Insecure Deserialization

IBM MQ Operator contains an insecure deserialization vulnerability caused by unrestricted Java deserialization in MQ Classes for Java, letting authenticated attackers cause denial of service or execute arbitrary code.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
View the NVD record ↗

Details

Type
Insecure Deserialization
Impact
Remote Code Execution, Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
19 October 2026
Updated
20 October 2026
Weakness
CWE-502

Vendor fix

Update to the latest version of IBM MQ Operator.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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