CVE-2019-4655: IBM Mq

Medium severity, CVSS 4.3. EPSS: 1.3% chance of exploitation in the next 30 days.

IBM MQ 9.1.0.0, 9.1.0.1, 9.1.0.2, 9.1.0.3, 9.1.1, 9.1.2, and 9.1.3 is vulnerable to a denial of service attack that would allow an authenticated user to reset client connections due to an error within the Data Conversion routine. IBM X-Force ID: 170966.

Affected products

• IBM Mq: from 9.1.0, before 9.1.4 (fixed in 9.1.4); from 9.1.0.0, before 9.1.0.4 (fixed in 9.1.0.4)
• IBM Mq Appliance: from 9.1.0, before 9.1.4 (fixed in 9.1.4); from 9.1.0.0, before 9.1.0.4 (fixed in 9.1.0.4)

Published 2019-12-30. Last modified 2026-06-17.