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Both 3.0.1 and 3.0.2 fix security issues. In 3.0.1: * Fix a bug that would lead to Waitress busy looping on select() on a half-open socket due to a race condition that existed when creating a new HTTPChannel. See https://github.com/Pylons/waitress/pull/435, https://github.com/Pylons/waitress/issues/418 and https://github.com/Pylons/waitress/security/advisories/GHSA-3f84-rpwh-47g6 * With thanks to Dylan Jay and Dieter Maurer for their extensive debugging and helping track this down. * No longer strip the header values before passing them to the WSGI environ. See https://github.com/Pylons/waitress/pull/434 and https://github.com/Pylons/waitress/issues/432 * Fix a race condition in Waitress when channel_request_lookahead is enabled that could lead to HTTP request smuggling. See https://github.com/Pylons/waitress/security/advisories/GHSA-9298-4cf8-g4wj In 3.0.2: * When using Waitress to process trusted proxy headers, Waitress will now update the headers to drop any untrusted values, thereby making sure that WSGI apps only get trusted and validated values that Waitress itself used to update the environ. See https://github.com/Pylons/waitress/pull/452 and https://github.com/Pylons/waitress/issues/451 Full Changelog: https://docs.pylonsproject.org/projects/waitress/en/latest/#change-history Signed-off-by: Marcus Hoffmann <buildroot@bubu1.eu> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>