CVE-2019-4620

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-01-28 · updated 2026-06-17
Weakness: CWE-20

Description

IBM MQ Appliance 8.0 and 9.0 LTS could allow a local attacker to bypass security restrictions caused by improper validation of environment variables. IBM X-Force ID: 168863.

Affected products

IBM MQ Appliance: from 8.0.0.0 before 8.0.0.14; from 9.1.0 before 9.1.4; from 9.1.0.0 before 9.1.0.4 — fixed in 8.0.0.14, 9.1.0.4, 9.1.4

How to fix

Upgrade to a fixed version: IBM MQ Appliance 8.0.0.14, 9.1.0.4, 9.1.4. Check the vendor advisory for mitigations.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/168863
https://www.ibm.com/support/pages/node/1125891
https://exchange.xforce.ibmcloud.com/vulnerabilities/168863
https://www.ibm.com/support/pages/node/1125891

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