Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to 7.0.3, the rules inspecting HTTP2 headers can get bypassed by crafted traffic. The vulnerability has been patched in 7.0.3.
https://redmine.openinfosecfoundation.org/issues/6717
https://github.com/OISF/suricata/security/advisories/GHSA-gv29-5hqw-5h8c
https://github.com/OISF/suricata/commit/478a2a38f54e2ae235f8486bff87d7d66b6307f0