CVE-2020-4310: IBM Mq

High severity, CVSS 7.5. EPSS: 1.6% chance of exploitation in the next 30 days.

IBM MQ and MQ Appliance 7.1, 7.5, 8.0, 9.0 LTS, 9.1 LTS, and 9.1 C are vulnerable to a denial of service attack due to an error within the Data Conversion logic. IBM X-Force ID: 177081.

Affected products

• IBM Mq: from 8.0.0.0, before 8.0.0.15 (fixed in 8.0.0.15); from 9.0.0.0, before 9.0.0.10 (fixed in 9.0.0.10); from 9.1.0, before 9.1.5 (fixed in 9.1.5); from 9.1.0.0, before 9.1.0.5 (fixed in 9.1.0.5)
• IBM WebSphere Mq: version 7.1 only; version 7.5 only

Published 2020-06-16. Last modified 2026-06-17.