CVE-2026-12148: CWE-502 Deserialization of Untrusted Data in IBM MQ Operator
Description
CVE-2026-12148 is a high severity vulnerability in IBM MQ Operator caused by unrestricted Java deserialization in the MQ Classes for Java. An authenticated attacker could exploit this flaw to cause denial of service or potentially execute arbitrary code. The vulnerability affects multiple specific versions of IBM MQ Operator as listed. The CVSS 3.1 base score is 7.5, indicating a high impact on confidentiality, integrity, and availability.
CVSS v3.1
Score 7.5high
Affected software
IBM
MQ Operator
IBM
MQ Advanced container images
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
IBM MQ Operator contains a deserialization of untrusted data vulnerability (CWE-502) in the MQ Classes for Java component. This flaw allows an authenticated attacker to trigger denial of service or potentially execute arbitrary code by exploiting unrestricted Java deserialization. The vulnerability affects a range of versions from 2.0.0 up to various 3.x and 9.x releases, including specific patch-level versions. The CVSS 3.1 vector indicates network attack vector, high attack complexity, low privileges required, no user interaction, unchanged scope, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation could lead to denial of service or arbitrary code execution within the IBM MQ Operator environment, impacting system availability and potentially compromising system integrity and confidentiality.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Until a patch is available, restrict access to the IBM MQ Operator to trusted users only and monitor for suspicious activity related to Java deserialization.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-06-12T18:00:59.730Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ad64a132cdf04f6566e6f3e
Added to database: 10/19/2026, 16:49:23 UTC
Last enriched: 10/19/2026, 17:03:37 UTC
Last updated: 10/19/2026, 19:06:46 UTC
Views: 7
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