{"id":"CVE-2026-33814","revision":"667e1bd2abe24835bc4865cc79bb050a","records":[{"revision":"667e1bd2abe24835bc4865cc79bb050a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-33814","aliases":[],"title":"Infinite loop in HTTP/2 transport when given bad SETTINGS_MAX_FRAME_SIZE in net/http/internal/http2 in golang.org/x/net","description":"When processing HTTP/2 SETTINGS frames, transport will enter an infinite loop of writing CONTINUATION frames if it receives a SETTINGS_MAX_FRAME_SIZE with a value of 0.","state":0,"publishedAt":"2026-05-07T19:41:17.631+00:00","modifiedAt":"2026-09-18T12:04:46.954+00:00","affected":[{"ecosystem":"https://pkg.go.dev","name":"golang.org/x/net/http2","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"golang.org/x/net\",\n                    \"product\": \"golang.org/x/net/http2\",\n                    \"collectionURL\": \"https://pkg.go.dev\",\n                    \"packageName\": \"golang.org/x/net/http2\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"0.53.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"clientConnReadLoop.processSettingsNoWrite\"\n                        },\n                        {\n                            \"name\": \"Transport.NewClientConn\"\n                        },\n                        {\n                            \"name\": \"Transport.RoundTrip\"\n                        },\n                        {\n                            \"name\": \"Transport.RoundTripOpt\"\n                        },\n                        {\n                            \"name\": \"clientConnPool.GetClientConn\"\n                        },\n                        {\n                            \"name\": \"noDialClientConnPool.GetClientConn\"\n                        },\n                        {\n                            \"name\": \"noDialH2RoundTripper.NewClientConn\"\n                        },\n                        {\n                            \"name\": \"noDialH2RoundTripper.RoundTrip\"\n                        },\n                        {\n                            \"name\": \"unencryptedTransport.RoundTrip\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"},{"ecosystem":"https://pkg.go.dev","name":"net/http","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Go standard library\",\n                    \"product\": \"net/http\",\n                    \"collectionURL\": \"https://pkg.go.dev\",\n                    \"packageName\": \"net/http\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"1.25.10\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"1.26.0-0\",\n                            \"lessThan\": \"1.26.3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"http2clientConnReadLoop.processSettingsNoWrite\"\n                        },\n                        {\n                            \"name\": \"Client.CloseIdleConnections\"\n                        },\n                        {\n                            \"name\": \"Client.Do\"\n                        },\n                        {\n                            \"name\": \"Client.Get\"\n                        },\n                        {\n                            \"name\": \"Client.Head\"\n                        },\n                        {\n                            \"name\": \"Client.Post\"\n                        },\n                        {\n                            \"name\": \"Client.PostForm\"\n                        },\n                        {\n                            \"name\": \"ClientConn.Close\"\n                        },\n                        {\n                            \"name\": \"ClientConn.RoundTrip\"\n                        },\n                        {\n                            \"name\": \"Get\"\n                        },\n                        {\n                            \"name\": \"Head\"\n                        },\n                        {\n                            \"name\": \"Post\"\n                        },\n                        {\n                            \"name\": \"PostForm\"\n                        },\n                        {\n                            \"name\": \"Transport.CloseIdleConnections\"\n                        },\n                        {\n                            \"name\": \"Transport.NewClientConn\"\n                        },\n                        {\n                            \"name\": \"Transport.RoundTrip\"\n                        },\n                        {\n                            \"name\": \"http1ClientConn.Close\"\n                        },\n                        {\n                            \"name\": \"http1ClientConn.RoundTrip\"\n                        },\n                        {\n                            \"name\": \"http2Transport.NewClientConn\"\n                        },\n                        {\n                            \"name\": \"http2Transport.RoundTrip\"\n                        },\n                        {\n                            \"name\": \"http2Transport.RoundTripOpt\"\n                        },\n                        {\n                            \"name\": \"http2clientConnPool.GetClientConn\"\n                        },\n                        {\n                            \"name\": \"http2noDialClientConnPool.GetClientConn\"\n                        },\n                        {\n                            \"name\": \"http2noDialH2RoundTripper.NewClientConn\"\n                        },\n                        {\n                            \"name\": \"http2noDialH2RoundTripper.RoundTrip\"\n                        },\n                        {\n                            \"name\": \"http2unencryptedTransport.RoundTrip\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[],"references":["https://go.dev/cl/761581","https://go.dev/cl/761640","https://go.dev/issue/78476","https://groups.google.com/g/golang-announce/c/qcCIEXso47M","https://pkg.go.dev/vuln/GO-2026-4918"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-33814","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-33814","identifiers":["CVE-2026-33814"]},"retained":false,"historicalAffected":[]}],"coverage":[]}