CVE-2026-10859
Undergoing Analysis Undergoing Analysis - In Progress

IBM MQ Insecure Deserialization Arbitrary Code Execution

Publication date: 2026-11-04

Last updated on: 2026-11-04

Assigner: IBM Corporation

Description
IBM MQ 9.2.0.0 through 9.2.0.44 LTS, 9.3.0.0 through 9.3.0.42 LTS, 9.4.0.0 through 9.4.0.26 LTS, 9.4.0.0 through 9.4.5.1 CD, and 10.0.0.0 through 10.0.0.5 LTS and CD could allow an authenticated attacker to execute arbitrary code on consumer applications due to insecure deserialization of ObjectMessage payloads.

CVSS Scores

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Meta Information

Published
2026-11-04
Last Modified
2026-11-04
Generated
2026-11-05
AI Q&A
2026-11-04
EPSS Evaluated
N/A
NVD
CVE-2026-10859
EUVD
EUVD-2026-117076

Affected Vendors & Products

Showing 5 associated CPEs
Vendor Product Version / Range
IBM MQ 9.2.0.0
IBM MQ 9.3.0.0
IBM MQ 9.4.0.0
IBM MQ 9.4.0.0
IBM MQ 10.0.0.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability is an insecure deserialization flaw in IBM MQ's ObjectMessage payload handling. An authenticated attacker can exploit it to execute arbitrary code on consumer applications by sending specially crafted serialized data. The .NET messaging component is specifically affected.

Impact Analysis

An attacker could gain control over consumer applications, leading to potential data breaches, system compromise, or disruption of messaging services. The high CVSS score indicates significant risks to confidentiality, integrity, and availability of affected systems.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating GDPR's data protection requirements and HIPAA's safeguards for protected health information. Compliance failures may result in legal penalties, fines, or reputational damage.

Mitigation Strategies

Apply the latest security updates for your IBM MQ version. For IBM MQ 9.2 LTS, install cumulative security update 9.2.0.46. For 9.3 LTS, install 9.3.0.43. For 9.4 LTS, install fix pack 9.4.0.30. Upgrade to 10.0.0.6 for 10.0 LTS or to 10.0.1.0 for 9.4 CD and 10.0 CD.

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