s/1.1.13/>1.1.13</a> and <a href=/v1.2/about/notes/1.2.4/>1.2.4</a> address vulnerabilities that can be used to mount a Denial of Service (DoS) attack against services using Istio.</p><p><strong>ISTIO-SECURITY-2019-003</strong>: An Envoy user reported publicly an issue (c.f. <a href=https://github.com/envoyproxy/envoy/issues/7728>Envoy Issue 7728</a>) about regular expressions (or regex) matching that crashes Envoy with very large URIs.</p><ul><li><strong><a href="https://cve.mitre.org/cgi-bin/cvename.cgi?n