The HTTP and WebSocket engine components in the server in Kaazing Gateway before 4.5.3 hotfix-1, Gateway - JMS Edition before 4.0.5 hotfix-15, 4.0.6 before hotfix-4, 4.0.7, 4.0.9 before hotfix-19, 4.4.x before 4.4.2 hotfix-1, 4.5.x before 4.5.3 hotfix-1, and Gateway Community and Enterprise Editions before 5.6.0 allow remote attackers to bypass intended access restrictions and obtain sensitive information via vectors related to HTTP request handling.