CVE-2023-45648

Improper Input Validation vulnerability in Apache Tomcat.Tomcatfrom 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.81 and from 8.5.0 through 8.5.93 did not correctly parse HTTP trailer headers. A specially 
crafted, invalid trailer header could cause Tomcat to treat a single 
request as multiple requests leading to the possibility of request 
smuggling when behind a reverse proxy.

Older, EOL versions may also be affected.


Users are recommended to upgrade to version 11.0.0-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fix the issue.