CVE-2019-4141: IBM WebSphere Mq

Medium severity, CVSS 6.5. EPSS: 1.3% chance of exploitation in the next 30 days.

IBM MQ 7.1.0.0 - 7.1.0.9, 7.5.0.0 - 7.5.0.9, 8.0.0.0 - 8.0.0.11, 9.0.0.0 - 9.0.0.6, 9.1.0.0 - 9.1.0.2, and 9.1.1 - 9.1.2 is vulnerable to a denial of service attack caused by a memory leak in the clustering code. IBM X-Force ID: 158337.

Affected products

• IBM WebSphere 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 8.0.0.11; from 9.0.0.0, up to and including 9.0.0.6; from 9.1.0.0, up to and including 9.1.0.2; from 9.1.1, up to and including 9.1.2
• IBM WebSphere Mq Appliance: from 8.0.0.0, up to and including 8.0.0.11; from 9.1.0.0, up to and including 9.1.0.2; from 9.1.1, up to and including 9.1.2

Published 2019-09-27. Last modified 2026-06-17.