.. _version_history_1.21.1:

1.21.1 (February 22, 2022)
===========================






Bug fixes
---------

*Changes expected to improve the state of the world and are unlikely to have negative effects*



* **data plane**: fix crash when internal redirect selects a route configured with direct response or redirect actions.
* **jwt_authn**: fixed the crash when a CONNECT request is sent to JWT filter configured with regex match on the Host header.
* **tcp_proxy**: fix a crash that occurs when configured for :ref:`upstream tunneling
  <v1.21:envoy_v3_api_field_extensions.filters.network.tcp_proxy.v3.TcpProxy.tunneling_config>` and the downstream connection
  disconnects while the the upstream connection or http/2 stream is still being established.
* **upstream**: fix stack overflow when a cluster with large number of idle connections is removed.