IBM MQ Operator Unrestricted Java Deserialization (CVE-2026-12148)
CVE-2026-12148 Published on October 19, 2026

IBM MQ Deserialization of Untrusted Data
IBM MQ Operator could allow an authenticated attacker to cause a denial of service or potentially execute arbitrary code due to unrestricted Java deserialization in the MQ Classes for Java.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2026-12148 is exploitable with network access, and requires small amount of user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.

Attack Vector:
NETWORK
Attack Complexity:
HIGH
Privileges Required:
LOW
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Weakness Type

What is a Marshaling, Unmarshaling Vulnerability?

The application deserializes untrusted data without sufficiently verifying that the resulting data will be valid.

CVE-2026-12148 has been classified to as a Marshaling, Unmarshaling vulnerability or weakness.


Products Associated with CVE-2026-12148

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IBM Mq Operator
 
IBM Mq Advanced Container Images
 

Affected Versions

IBM MQ Operator: IBM MQ Advanced container images: