CVE-2019-4378: IBM Mq

Medium severity, CVSS 6.5. EPSS: 1.4% chance of exploitation in the next 30 days.

IBM MQ 7.5.0.0 - 7.5.0.9, 7.1.0.0 - 7.1.0.9, 8.0.0.0 - 8.0.0.12, 9.0.0.0 - 9.0.0.6, 9.1.0.0 - 9.1.0.2, and 9.1.0 - 9.1.2 command server is vulnerable to a denial of service attack caused by an authenticated and authorized user using specially crafted PCF messages. IBM X-Force ID: 162084.

Affected products

• IBM Mq: from 7.1.0.0, up to and including 7.1.0.9; from 7.5.0.0, up to and including 7.5.0.9; from 8.0.0.0, up to and including 8.0.0.12; from 9.0.0.0, up to and including 9.0.0.6; from 9.1.0.0, up to and including 9.1.2.0

Published 2019-09-26. Last modified 2026-06-17.