{"id":"GO-2026-6090","summary":"Limit handshake messages we are willing to accept post-handshake in crypto/tls","details":"Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not. As a result, a malicious client can keep sending KeyUpdate messages to force the server to keep performing key derivation operations indefinitely.","aliases":["BIT-golang-2026-56862","CVE-2026-56862"],"modified":"2026-10-05T10:26:50.747601075Z","published":"2026-08-13T21:43:54Z","related":["RHSA-2026:54835","RHSA-2026:54836","RHSA-2026:60304","RHSA-2026:60305","RHSA-2026:60306","RHSA-2026:61882","RHSA-2026:62404","RHSA-2026:62405","RHSA-2026:62406","RHSA-2026:62407","RHSA-2026:62577","RHSA-2026:62578","RHSA-2026:62602","RHSA-2026:62631","RHSA-2026:62753","RHSA-2026:62754","RHSA-2026:62803","RHSA-2026:63022","RHSA-2026:63119","RHSA-2026:63124","RHSA-2026:63127","RHSA-2026:63130","RHSA-2026:63136","RHSA-2026:63163","RHSA-2026:63332","RHSA-2026:64777","RHSA-2026:64786","RHSA-2026:64788","RHSA-2026:64818","RHSA-2026:65116","RHSA-2026:65117","RHSA-2026:65153","RHSA-2026:65335","RHSA-2026:65336","RHSA-2026:65359","RHSA-2026:65534","RHSA-2026:65880","RHSA-2026:65886","RHSA-2026:65895","RHSA-2026:65918","RHSA-2026:66016","RHSA-2026:66327","RHSA-2026:66350","RHSA-2026:66356","RHSA-2026:66364","RHSA-2026:66375","RHSA-2026:66459","RHSA-2026:67128","RHSA-2026:67132","RHSA-2026:67149","RHSA-2026:67153","RHSA-2026:67159","RHSA-2026:67160","RHSA-2026:67161","RHSA-2026:67287","RHSA-2026:67313","RHSA-2026:67319","RHSA-2026:67464","RHSA-2026:67517","RHSA-2026:67518","RHSA-2026:67934","RHSA-2026:67974","RHSA-2026:67975","RHSA-2026:68334","RHSA-2026:68335","RHSA-2026:68504","RHSA-2026:68527","RHSA-2026:68534","RHSA-2026:68538","RHSA-2026:69103","RHSA-2026:69104","RHSA-2026:69105","RHSA-2026:69107","RHSA-2026:69235","RHSA-2026:69308","RHSA-2026:69961","RHSA-2026:70103","RHSA-2026:70201","RHSA-2026:70391","RHSA-2026:70585","RHSA-2026:70614","RHSA-2026:70640","RHSA-2026:70641","RHSA-2026:70645","RHSA-2026:71112","RHSA-2026:71113","RHSA-2026:71114","RHSA-2026:71443","RHSA-2026:71445","RHSA-2026:71672","RHSA-2026:72276","RHSA-2026:72737","RHSA-2026:72805","RHSA-2026:74503","RHSA-2026:74504","RHSA-2026:74505","RHSA-2026:74506","RHSA-2026:75689"],"database_specific":{"review_status":"REVIEWED","url":"https://pkg.go.dev/vuln/GO-2026-6090"},"references":[{"type":"REPORT","url":"https://go.dev/issue/80528"},{"type":"FIX","url":"https://go.dev/cl/804261"},{"type":"WEB","url":"https://groups.google.com/g/golang-announce/c/94pEornpRlI"}],"affected":[{"package":{"name":"stdlib","ecosystem":"Go","purl":"pkg:golang/stdlib"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.25.13"},{"introduced":"1.26.0-0"},{"fixed":"1.26.6"},{"introduced":"1.27.0-0"},{"fixed":"1.27.0-rc.3"}]}],"ecosystem_specific":{"imports":[{"symbols":["Conn.Handshake","Conn.HandshakeContext","Conn.Read","Conn.Write","Conn.readRecordOrCCS","Dial","DialWithDialer","Dialer.Dial","Dialer.DialContext","QUICConn.HandleData","QUICConn.Start"],"path":"crypto/tls"}]},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2026-6090.json"}}],"schema_version":"1.9.0","credits":[{"name":"Qi Deng of Aurascape.ai"}]}