High DSA-5009-1 1 CVE

tomcat9 - security update

Published Nov 12, 2021 · Updated Mar 9, 2026

Ecosystem: Debian

Fixed packages 1

Release	Package	Fixed in
Debian · 11	tomcat9	9.0.43-2~deb11u3

Vulnerabilities 1

High 7.5

CVE-2021-42340 EPSS 12%

DoS via memory leak with WebSocket connections

The fix for bug 63362 present in Apache Tomcat 10.1.0-M1 to 10.1.0-M5, 10.0.0-M1 to 10.0.11, 9.0.40 to 9.0.53 and 8.5.60 to 8.5.71 introduced a memory leak. The object introduced to collect metrics for HTTP upgrade connections was not released for WebSocket c…

Apache Software Foundation Apache Tomcat org.apache.tomcat:tomcat tomcat9 Debian Maven

Oct 14, 2021