A specially crafted sequence of HTTP/2 requests sent to Apache Tomcat 10.0.0-M1 to 10.0.0-M5, 9.0.0.M1 to 9.0.35 and 8.5.0 to 8.5.55 could trigger high CPU usage for several seconds. If a sufficient number of such requests were made on concurrent HTTP/2 connections, the server could become unresponsive.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Tomcat | Apache | 8.5.0 (including) | 8.5.55 (including) |
| Tomcat | Apache | 9.0.0 (including) | 9.0.35 (including) |
| Tomcat | Apache | 9.0.0-milestone1 (including) | 9.0.0-milestone1 (including) |
| Tomcat | Apache | 9.0.0-milestone10 (including) | 9.0.0-milestone10 (including) |
| Tomcat | Apache | 9.0.0-milestone11 (including) | 9.0.0-milestone11 (including) |
| Tomcat | Apache | 9.0.0-milestone12 (including) | 9.0.0-milestone12 (including) |
| Tomcat | Apache | 9.0.0-milestone13 (including) | 9.0.0-milestone13 (including) |
| Tomcat | Apache | 9.0.0-milestone14 (including) | 9.0.0-milestone14 (including) |
| Tomcat | Apache | 9.0.0-milestone15 (including) | 9.0.0-milestone15 (including) |
| Tomcat | Apache | 9.0.0-milestone16 (including) | 9.0.0-milestone16 (including) |
| Tomcat | Apache | 9.0.0-milestone17 (including) | 9.0.0-milestone17 (including) |
| Tomcat | Apache | 9.0.0-milestone18 (including) | 9.0.0-milestone18 (including) |
| Tomcat | Apache | 9.0.0-milestone19 (including) | 9.0.0-milestone19 (including) |
| Tomcat | Apache | 9.0.0-milestone2 (including) | 9.0.0-milestone2 (including) |
| Tomcat | Apache | 9.0.0-milestone20 (including) | 9.0.0-milestone20 (including) |
| Tomcat | Apache | 9.0.0-milestone21 (including) | 9.0.0-milestone21 (including) |
| Tomcat | Apache | 9.0.0-milestone22 (including) | 9.0.0-milestone22 (including) |
| Tomcat | Apache | 9.0.0-milestone23 (including) | 9.0.0-milestone23 (including) |
| Tomcat | Apache | 9.0.0-milestone24 (including) | 9.0.0-milestone24 (including) |
| Tomcat | Apache | 9.0.0-milestone25 (including) | 9.0.0-milestone25 (including) |
| Tomcat | Apache | 9.0.0-milestone26 (including) | 9.0.0-milestone26 (including) |
| Tomcat | Apache | 9.0.0-milestone27 (including) | 9.0.0-milestone27 (including) |
| Tomcat | Apache | 9.0.0-milestone3 (including) | 9.0.0-milestone3 (including) |
| Tomcat | Apache | 9.0.0-milestone4 (including) | 9.0.0-milestone4 (including) |
| Tomcat | Apache | 9.0.0-milestone5 (including) | 9.0.0-milestone5 (including) |
| Tomcat | Apache | 9.0.0-milestone6 (including) | 9.0.0-milestone6 (including) |
| Tomcat | Apache | 9.0.0-milestone7 (including) | 9.0.0-milestone7 (including) |
| Tomcat | Apache | 9.0.0-milestone8 (including) | 9.0.0-milestone8 (including) |
| Tomcat | Apache | 9.0.0-milestone9 (including) | 9.0.0-milestone9 (including) |
| Tomcat | Apache | 10.0.0-milestone1 (including) | 10.0.0-milestone1 (including) |
| Tomcat | Apache | 10.0.0-milestone2 (including) | 10.0.0-milestone2 (including) |
| Tomcat | Apache | 10.0.0-milestone3 (including) | 10.0.0-milestone3 (including) |
| Tomcat | Apache | 10.0.0-milestone4 (including) | 10.0.0-milestone4 (including) |
| Tomcat | Apache | 10.0.0-milestone5 (including) | 10.0.0-milestone5 (including) |
| Tomcat8 | Ubuntu | bionic | * |
| Tomcat8 | Ubuntu | trusty | * |
| Tomcat9 | Ubuntu | bionic | * |
| Tomcat9 | Ubuntu | eoan | * |
| Tomcat9 | Ubuntu | focal | * |
| Tomcat9 | Ubuntu | trusty | * |
| Tomcat9 | Ubuntu | upstream | * |
| Red Hat Fuse 7.9 | RedHat | tomcat | * |
| Red Hat JBoss Web Server 5 | RedHat | tomcat | * |
| Red Hat JBoss Web Server 5.4 on RHEL 6 | RedHat | jws5-jboss-logging-0:3.4.1-1.Final_redhat_00001.1.el6jws | * |
| Red Hat JBoss Web Server 5.4 on RHEL 6 | RedHat | jws5-mod_cluster-0:1.4.2-7.Final_redhat_00002.2.el6jws | * |
| Red Hat JBoss Web Server 5.4 on RHEL 6 | RedHat | jws5-tomcat-0:9.0.36-6.redhat_5.2.el6jws | * |
| Red Hat JBoss Web Server 5.4 on RHEL 6 | RedHat | jws5-tomcat-native-0:1.2.25-2.redhat_2.el6jws | * |
| Red Hat JBoss Web Server 5.4 on RHEL 7 | RedHat | jws5-jboss-logging-0:3.4.1-1.Final_redhat_00001.1.el7jws | * |
| Red Hat JBoss Web Server 5.4 on RHEL 7 | RedHat | jws5-mod_cluster-0:1.4.2-7.Final_redhat_00002.2.el7jws | * |
| Red Hat JBoss Web Server 5.4 on RHEL 7 | RedHat | jws5-tomcat-0:9.0.36-6.redhat_5.2.el7jws | * |
| Red Hat JBoss Web Server 5.4 on RHEL 7 | RedHat | jws5-tomcat-native-0:1.2.25-2.redhat_2.el7jws | * |
| Red Hat JBoss Web Server 5.4 on RHEL 8 | RedHat | jws5-jboss-logging-0:3.4.1-1.Final_redhat_00001.1.el8jws | * |
| Red Hat JBoss Web Server 5.4 on RHEL 8 | RedHat | jws5-mod_cluster-0:1.4.2-7.Final_redhat_00002.2.el8jws | * |
| Red Hat JBoss Web Server 5.4 on RHEL 8 | RedHat | jws5-tomcat-0:9.0.36-6.redhat_5.2.el8jws | * |
| Red Hat JBoss Web Server 5.4 on RHEL 8 | RedHat | jws5-tomcat-native-0:1.2.25-2.redhat_2.el8jws | * |
| Red Hat support for Spring Boot 2.3.6 | RedHat | tomcat | * |
| Text-Only RHOAR | RedHat | tomcat | * |