formed HTTP request missing the &ldquo;Host&rdquo; header. An encoder filter that invokes Envoy&rsquo;s route manager APIs that access request&rsquo;s &ldquo;Host&rdquo; header will cause a NULL pointer to be dereferenced and result in abnormal termination of the Envoy process.</p></div><nav class=pagenav><div class=left><a title="Istio 1.4.3 patch release." href=/v1.23/news/releases/1.4.x/announcing-1.4.3/ class=next-link><svg class="icon left-arrow"><use xlink:href="/v1.23/img/icons.svg#left-arrow"/></svg