Heap overflow and improper input validation in Envoy (December 10, 2019)" href=/v1.9/news/security/istio-security-2019-007/>ISTIO-SECURITY-2019-007</a></li><li role=none><a role=treeitem title="Denial of service (November 7, 2019)" href=/v1.9/news/security/istio-security-2019-006/>ISTIO-SECURITY-2019-006</a></li><li role=none><a role=treeitem title="Denial of service caused by the presence of numerous HTTP headers in client requests (October 8, 2019)" href=/v1.9/news/security/istio-security-2019-005/>ISTIO-