CVE-2016-9589: Red Hat JBoss Wildfly Application Server

High severity, CVSS 7.5. EPSS: 3% chance of exploitation in the next 30 days.

Undertow in Red Hat wildfly before version 11.0.0.Beta1 is vulnerable to a resource exhaustion resulting in a denial of service. Undertow keeps a cache of seen HTTP headers in persistent connections. It was found that this cache can easily exploited to fill memory with garbage, up to "max-headers" (default 200) * "max-header-size" (default 1MB) per active TCP connection.

Affected products

• Red Hat JBoss Wildfly Application Server: up to and including 10.1.0; version 11.0.0 only

Published 2018-03-12. Last modified 2026-06-17.