CVE-2020-4310

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-06-16 · updated 2026-06-17

Description

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; from 9.0.0.0 before 9.0.0.10; from 9.1.0 before 9.1.5; from 9.1.0.0 before 9.1.0.5 — fixed in 8.0.0.15, 9.0.0.10, 9.1.0.5, 9.1.5
IBM Corporation WebSphere MQ: 7.1, 7.5

How to fix

Upgrade to a fixed version: IBM MQ 8.0.0.15, 9.0.0.10, 9.1.0.5, 9.1.5. Check the vendor advisory for mitigations.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/177081
https://www.ibm.com/support/pages/node/6223914
https://exchange.xforce.ibmcloud.com/vulnerabilities/177081
https://www.ibm.com/support/pages/node/6223914

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