IBM MQ Cluster Command Length Validation Vulnerability (CVE-2026-10853)
CVE-2026-10853 Published on September 18, 2026

IBM MQ queue manager is vulnerable to remote code execution
IBM MQ could allow an authenticated attacker with cluster access to cause a denial of service or potentially execute arbitrary code due to improper validation of cluster command message lengths.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2026-10853 can be exploited 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 Reflection Injection Vulnerability?

The application uses external input with reflection to select which classes or code to use, but it does not sufficiently prevent the input from selecting improper classes or code. If the application uses external inputs to determine which class to instantiate or which method to invoke, then an attacker could supply values to select unexpected classes or methods. If this occurs, then the attacker could create control flow paths that were not intended by the developer. These paths could bypass authentication or access control checks, or otherwise cause the application to behave in an unexpected manner. This situation becomes a doomsday scenario if the attacker can upload files into a location that appears on the application's classpath (CWE-427) or add new entries to the application's classpath (CWE-426). Under either of these conditions, the attacker can use reflection to introduce new, malicious behavior into the application.

CVE-2026-10853 has been classified to as a Reflection Injection vulnerability or weakness.


Products Associated with CVE-2026-10853

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IBM Mq
 

Affected Versions

IBM MQ:

Exploit Probability

EPSS
0.37%
Percentile
28.77%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.