title: Incorrect Transfer-Encoding handling with HTTP/1.0
description: Apache Tomcat 10.0.0-M1 to 10.0.6, 9.0.0.M1 to 9.0.46 and 8.5.0 to 8.5.66 did not correctly parse the HTTP transfer-encoding request header in some circumstances leading to the possibility to request smuggling when used with a reverse proxy. Specifically: - Tomcat incorrectly ignored the transfer encoding header if the client declared it would only accept an HTTP/1.0 response; - Tomcat honoured the identify encoding; and - Tomcat did not ensure that, if present, the chunked encoding was the final encoding.
problem types: CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')
affected:
{
product: Apache Tomcat
vendor: Apache Software Foundation
versions:
status: affected, version: Apache Tomcat 10 10.0.0-M1 to 10.0.6
status: affected, version: Apache Tomcat 9 9.0.0.M1 to 9.0.46
status: affected, version: Apache Tomcat 8 8.5.0 to 8.5.66
}