IBM MQ Off-by-One Buffer Overflow Allows Authenticated Process Instability
CVE-2026-12727 Published on October 19, 2026

IBM MQ Buffer Overflow
IBM MQ could allow an authenticated attacker to cause potential process instability due to an off-by-one buffer overflow when processing specially crafted object names.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2026-12727 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 have no impact on confidentiality and integrity, and a small impact on availability.

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

Weakness Type

What is an off-by-five Vulnerability?

A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.

CVE-2026-12727 has been classified to as an off-by-five vulnerability or weakness.


Products Associated with CVE-2026-12727

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IBM Mq Operator
 
IBM Mq Advanced Container Images
 

Affected Versions

IBM MQ Operator: IBM MQ Advanced container images: