What is CVE-2019-4620?

CVE-2019-4620 is a high-severity vulnerability in IBM Mq Appliance, classified under Improper Input Validation. CVSS score: 7.8/10. Published 2020-01-28.

How severe is CVE-2019-4620?

High severity. CVSS v3 base score is 7.8 out of 10.

Improper input validation in IBM Mq Appliance

CVE-2019-4620

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.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2020-01-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (27.5th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

IBM Mq Appliance — versions 8.0.0.3, 8.0.0.4, 8.0.0.5
IBM Mq Appliance

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

www.ibm.com/support/pages/node/1125891 (Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/168863 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2019-4620?: CVE-2019-4620 is a high-severity vulnerability in IBM Mq Appliance, classified under Improper Input Validation. CVSS score: 7.8/10. Published 2020-01-28.
How severe is CVE-2019-4620?: High severity. CVSS v3 base score is 7.8 out of 10.