urity Vulnerabilities</a>).</p><h2 id=bug-fixes>Bug fixes</h2><ul><li>Fix an Envoy bug that breaks <code>java.net.http.HttpClient</code> and other clients that attempt to upgrade from <code>HTTP/1.1</code> to <code>HTTP/2</code> using the <code>Upgrade: h2c</code> header (<a href=https://github.com/istio/istio/issues/16391>Issue 16391</a>).</li><li>Fix a memory leak on send timeout (<a href=https://github.com/istio/istio/issues/15876>Issue 15876</a>).</li></ul></article><nav class=pagenav><div class=left><a