CVE-2026-12666

published 2026-09-15

CVE-2026-12666: 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…

Priority P3 45 high 8.1 CVSS 3.1

AV N AC L PR L UI N S U C H I N A H

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.

Affected

5 ranges

Vendor	Product	Version range	Fixed in
ibm	mq	—	—
ibm	mq	9.1.0.0 – 9.1.0.37 LTS	—
ibm	mq	9.2.0.0 – 9.2.0.43 LTS	—
ibm	mq	9.3.0.0 – 9.3.0.41 LTS	—
ibm	mq	9.4.0.0 – 9.4.0.25 LTS	—

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CWE-611