CVE-2019-10072: Apache Tomcat

High severity, CVSS 7.5. EPSS: 73% chance of exploitation in the next 30 days.

The fix for CVE-2019-0199 was incomplete and did not address HTTP/2 connection window exhaustion on write in Apache Tomcat versions 9.0.0.M1 to 9.0.19 and 8.5.0 to 8.5.40 . By not sending WINDOW_UPDATE messages for the connection window (stream 0) clients were able to cause server-side threads to block eventually leading to thread exhaustion and a DoS.

Affected products

• Apache Tomcat: from 8.5.0, up to and including 8.5.40; from 9.0.1, up to and including 9.0.19; version 9.0.0 only

Published 2019-06-21. Last modified 2026-06-17.