HTTP2 stream ID is not checked for some frame types --------------------------------------------------- Key: WFLY-5364 URL: https://issues.jboss.org/browse/WFLY-5364 Project: WildFly Issue Type: Bug Components: Web (Undertow) Affects Versions: 10.0.0.CR1 Reporter: Jan Stourac Assignee: Stuart Douglas According to [RFC7540|https://tools.ietf.org/html/rfc7540] frame types DATA and HEADERS are associated with particular data stream, therefore if its stream id is 0 this should be processed as PROTOCOL_ERROR. Similarly frames of types GOAWAY and SETTINGS must not be associated with particular stream id other than 0, if so then PROTOCOL_ERROR should be raised. With current implementation this requirement is not checked causing discrepation against RFC specification.