CVE-2019-4261: IBM Mq

Medium severity, CVSS 6.5. EPSS: 2.4% chance of exploitation in the next 30 days.

IBM WebSphere MQ V7.1, 7.5, IBM MQ V8, IBM MQ V9.0LTS, IBM MQ V9.1 LTS, and IBM MQ V9.1 CD are vulnerable to a denial of service attack caused by specially crafted messages. IBM X-Force ID: 160013.

Affected products

• IBM Mq: 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, up to and including 9.1.2; from 9.1.0.0, up to and including 9.1.0.2
• IBM WebSphere Mq: from 7.1.0.0, up to and including 7.1.0.9; from 7.5, up to and including 7.5.0.9

Published 2019-08-05. Last modified 2026-06-17.