CVE-2026-12666

EUVD-2026-78873
IBM MQ 9.1.0.0 through 9.1.0.37 LTS, 9.2.0.0 through 9.2.0.43 LTS, 9.3.0.0 through 9.3.0.41 LTS, 9.3.0.0 through 9.3.5.1 CD, 9.4.0.0 through 9.4.0.25 LTS, 9.4.0.0 through 9.4.5.1 CD, and 10.0.0.0 Classes for Java could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to XML external entity injection in MQRFH2 header processing.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
ibmCNA
8.1 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
ibmmq
9.1.0.0 ≤
CNA
ibmmq
9.2.0.0 ≤
CNA
ibmmq
9.3.0.0 ≤
CNA
ibmmq
9.4.0.0 ≤
CNA
ibmmq
10.0.0.0
CNA
Common Weakness Enumeration
References
https://www.ibm.com/support/pages/node/7284939