If Apache Tomcat 8.5.0 to 8.5.82, 9.0.0-M1 to 9.0.67, 10.0.0-M1 to 10.0.26 or 10.1.0-M1 to 10.1.0 was configured to ignore invalid HTTP headers via setting rejectIllegalHeader to false (the default for 8.5.x only), Tomcat did not reject a request containing an invalid Content-Length header making a request smuggling attack possible if Tomcat was located behind a reverse proxy that also failed to reject the request with the invalid header.
| Software | From | Fixed in |
|---|---|---|
| apache / tomcat | 10.1.0 | 10.1.1 |
| apache / tomcat | 10.0.0 | 10.0.27 |
| apache / tomcat | 9.0.0 | 9.0.68 |
| apache / tomcat | 8.5.0 | 8.5.83 |
org.apache.tomcat / tomcat
|
8.5.0 | 8.5.83 |
org.apache.tomcat / tomcat
|
9.0.0-M1 | 9.0.68 |
org.apache.tomcat / tomcat
|
10.0.0-M1 | 10.0.27 |
org.apache.tomcat / tomcat
|
10.1.0-M1 | 10.1.1 |