.. _version_history_1.9.1:

1.9.1 (April 2, 2019)
======================



Changes
-------


* **http**: fixed CVE-2019-9900 by rejecting HTTP/1.x headers with embedded NUL characters.
* **http**: fixed CVE-2019-9901 by normalizing HTTP paths prior to routing or L7 data plane processing.
  This defaults off and is configurable via either HTTP connection manager :ref:`normalize_path
  <v1.9:envoy_api_field_config.filter.network.http_connection_manager.v2.HttpConnectionManager.normalize_path>`
  or the :ref:`runtime <v1.9:config_http_conn_man_runtime_normalize_path>`.