The Apache Tomcat team announces the immediate availability of Apache
Tomcat 8.5.83.

Apache Tomcat 8 is an open source software implementation of the Java
Servlet, JavaServer Pages, Java Unified Expression Language, Java
WebSocket and JASPIC technologies.

Apache Tomcat 8.5.83 is a bugfix and feature release. The notable
changes compared to 8.5.82 include:

- Add support for authenticating WebSocket clients with an HTTP forward
  proxy when establishing a connection to a WebSocket endpoint via a
  forward proxy that requires authentication. Based on a patch provided
  by Joe Mokos.

- Various fixes for edge case bugs in EL processing

- Enforce the requirement of RFC 7230 onwards that a request with a
  malformed content-length header should always be rejected with a 400

Along with lots of other bug fixes and improvements.

Please refer to the change log for the complete list of changes:


Migration guides from Apache Tomcat 7.x and 8.0:


- The Apache Tomcat team

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