CVE-2026-12538

EUVD-2026-117072
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.
Buffer Underflow
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
ibmCNA
5.4 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources (CNA/ADP records, vendor advisories, Enginsight analysis).
VendorProductVersionSource
ibmmq_appliance
9.4.0.0 ≤
𝑥
≤ 9.4.0.26
CNA
ibmmq_appliance
9.4.1.0 ≤
𝑥
≤ 9.4.5.3
CNA
ibmmq_appliance
10.0.0.1 ≤
𝑥
≤ 10.0.0.5
CNA
Common Weakness Enumeration
References
https://www.ibm.com/support/pages/node/7293035