{"id":"CVE-2026-32283","revision":"63cb773a2f514b0f918750dbc66c3e49","records":[{"revision":"63cb773a2f514b0f918750dbc66c3e49","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-32283","aliases":[],"title":"Unauthenticated TLS 1.3 KeyUpdate record can cause persistent connection retention and DoS in crypto/tls","description":"If one side of the TLS connection sends multiple key update messages post-handshake in a single record, the connection can deadlock, causing uncontrolled consumption of resources. This can lead to a denial of service. This only affects TLS 1.3.","state":0,"publishedAt":"2026-04-08T01:06:57.67+00:00","modifiedAt":"2026-09-18T12:04:39.526+00:00","affected":[{"ecosystem":"https://pkg.go.dev","name":"crypto/tls","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Go standard library\",\n                    \"product\": \"crypto/tls\",\n                    \"collectionURL\": \"https://pkg.go.dev\",\n                    \"packageName\": \"crypto/tls\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"1.25.9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"1.26.0-0\",\n                            \"lessThan\": \"1.26.2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"Conn.handleKeyUpdate\"\n                        },\n                        {\n                            \"name\": \"clientHandshakeStateTLS13.establishHandshakeKeys\"\n                        },\n                        {\n                            \"name\": \"clientHandshakeStateTLS13.readServerFinished\"\n                        },\n                        {\n                            \"name\": \"serverHandshakeStateTLS13.sendServerParameters\"\n                        },\n                        {\n                            \"name\": \"serverHandshakeStateTLS13.readClientFinished\"\n                        },\n                        {\n                            \"name\": \"Conn.Handshake\"\n                        },\n                        {\n                            \"name\": \"Conn.HandshakeContext\"\n                        },\n                        {\n                            \"name\": \"Conn.Read\"\n                        },\n                        {\n                            \"name\": \"Conn.Write\"\n                        },\n                        {\n                            \"name\": \"Dial\"\n                        },\n                        {\n                            \"name\": \"DialWithDialer\"\n                        },\n                        {\n                            \"name\": \"Dialer.Dial\"\n                        },\n                        {\n                            \"name\": \"Dialer.DialContext\"\n                        },\n                        {\n                            \"name\": \"QUICConn.HandleData\"\n                        },\n                        {\n                            \"name\": \"QUICConn.Start\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[],"references":["https://go.dev/cl/763767","https://go.dev/issue/78334","https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU","https://pkg.go.dev/vuln/GO-2026-4870"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-32283","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-32283","identifiers":["CVE-2026-32283"]},"retained":false,"historicalAffected":[]}],"coverage":[]}