{"schema_version":"1.9.0","id":"BIT-golang-2026-56862","published":"2026-08-19T11:37:50.799Z","modified":"2026-08-19T12:25:46.851852657Z","aliases":["CVE-2026-56862","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.","affected":[{"package":{"name":"golang","ecosystem":"Bitnami","purl":"pkg:bitnami/golang"},"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"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/golang/BIT-golang-2026-56862.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}],"references":[{"type":"WEB","url":"https://go.dev/cl/804261"},{"type":"WEB","url":"https://go.dev/issue/80528"},{"type":"WEB","url":"https://groups.google.com/g/golang-announce/c/94pEornpRlI"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56862"},{"type":"WEB","url":"https://pkg.go.dev/vuln/GO-2026-6090"}],"database_specific":{"cpes":["cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*"],"severity":"High"}}