CVE-2019-4720

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-01-31 · updated 2026-06-17
Weakness: CWE-770

Description

IBM WebSphere Application Server 7.0, 8.0, 8.5, and 9.0 is vulnerable to a denial of service, caused by sending a specially-crafted request. A remote attacker could exploit this vulnerability to cause the server to consume all available memory. IBM X-Force ID: 172125.

Affected products

IBM WebSphere Application Server: before 20.0.0.2; from 7.0.0.0 through 7.0.0.45; from 8.0.0.0 through 8.0.0.15; from 8.5.0.0 through 8.5.5.17; from 9.0.0.0 through 9.0.5.2 — fixed in 20.0.0.2

How to fix

Upgrade to a fixed version: IBM WebSphere Application Server 20.0.0.2. Check the vendor advisory for mitigations.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/172125
https://www.ibm.com/support/pages/node/1285372
https://exchange.xforce.ibmcloud.com/vulnerabilities/172125
https://www.ibm.com/support/pages/node/1285372

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