CVE-2026-12728: IBM Mq

High severity, CVSS 8.8. EPSS: 0.4% chance of exploitation in the next 30 days.

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 could allow an authenticated attacker to execute arbitrary code due to a deserialization of untrusted data.

Affected products

• IBM Mq: from 9.1.0.0, up to and including 9.1.0.37 LTS; from 9.2.0.0, up to and including 9.2.0.43 LTS; from 9.3.0.0, up to and including 9.3.0.41 LTS; from 9.3.0.0, up to and including 9.3.5.1 CD; from 9.4.0.0, up to and including 9.4.0.25 LTS; from 9.4.0.0, up to and including 9.4.5.1 CD; …

Published 2026-09-15. Last modified 2026-09-17.