CVE-2026-12538
IBM MQ Appliance is affected by an improper validation vulnerability
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
0th
IBM MQ 9.4.0.0 to 9.4.0.26, 9.4.1.0 to 9.4.5.3, and 10.0.0.1 to 10.0.0.5 could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to improper validation of message header structure length fields.
| CWE | CWE-124 |
| Vendor | ibm |
| Product | mq appliance |
| Published | Nov 4, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
Low
Affected Versions
IBM / MQ Appliance
9.4.0.0 ≤ 9.4.0.26 9.4.1.0 ≤ 9.4.5.3 10.0.0.1 ≤ 10.0.0.5