IBM MQ Authenticated Buffer Overflow in XA Transaction ID Processing
CVE-2026-11375 Published on September 18, 2026
IBM MQ queue manager is vulnerable to remote code execution
IBM MQ could allow an authenticated attacker to cause a denial of service or potentially execute arbitrary code due to a stack buffer overflow when processing XA transaction identifiers.
Vulnerability Analysis
CVE-2026-11375 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
Heap-based Buffer Overflow
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
Products Associated with CVE-2026-11375
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Affected Versions
IBM MQ:- Version 9.1.0.0, <= 9.1.0.37 LTS is affected.
- Version 9.2.0.0, <= 9.2.0.43 LTS is affected.
- Version 9.3.0.0, <= 9.3.0.41 LTS is affected.
- Version 9.3.0.0, <= 9.3.5.1 CD is affected.
- Version 9.4.0.0, <= 9.4.0.25 LTS is affected.
- Version 9.4.0.0, <= 9.4.5.1 CD is affected.
- Version 10.0.0.0 is affected.
Exploit Probability
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.