{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-32283", "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "state": "PUBLISHED", "assignerShortName": "Go", "dateReserved": "2026-03-11T16:38:46.556Z", "datePublished": "2026-04-08T01:06:57.670Z", "dateUpdated": "2026-04-08T01:06:57.670Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "shortName": "Go", "dateUpdated": "2026-04-08T01:06:57.670Z"}, "title": "Unauthenticated TLS 1.3 KeyUpdate record can cause persistent connection retention and DoS in crypto/tls", "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"vendor": "Go standard library", "product": "crypto/tls", "collectionURL": "https://pkg.go.dev", "packageName": "crypto/tls", "versions": [{"version": "0", "lessThan": "1.25.9", "status": "affected", "versionType": "semver"}, {"version": "1.26.0-0", "lessThan": "1.26.2", "status": "affected", "versionType": "semver"}], "programRoutines": [{"name": "Conn.handleKeyUpdate"}, {"name": "clientHandshakeStateTLS13.establishHandshakeKeys"}, {"name": "clientHandshakeStateTLS13.readServerFinished"}, {"name": "serverHandshakeStateTLS13.sendServerParameters"}, {"name": "serverHandshakeStateTLS13.readClientFinished"}, {"name": "Conn.Handshake"}, {"name": "Conn.HandshakeContext"}, {"name": "Conn.Read"}, {"name": "Conn.Write"}, {"name": "Dial"}, {"name": "DialWithDialer"}, {"name": "Dialer.Dial"}, {"name": "Dialer.DialContext"}, {"name": "QUICConn.HandleData"}, {"name": "QUICConn.Start"}], "defaultStatus": "unaffected"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-667: Improper Locking"}]}], "references": [{"url": "https://go.dev/cl/763767"}, {"url": "https://go.dev/issue/78334"}, {"url": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU"}, {"url": "https://pkg.go.dev/vuln/GO-2026-4870"}], "credits": [{"lang": "en", "value": "Jakub Ciolek - https://ciolek.dev/"}]}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-32283", "lastModified": "2026-04-08T02:16:03.580", "metrics": {}, "published": "2026-04-08T02:16:03.580", "references": [{"source": "security@golang.org", "url": "https://go.dev/cl/763767"}, {"source": "security@golang.org", "url": "https://go.dev/issue/78334"}, {"source": "security@golang.org", "url": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU"}, {"source": "security@golang.org", "url": "https://pkg.go.dev/vuln/GO-2026-4870"}], "sourceIdentifier": "security@golang.org", "vulnStatus": "Received"}

{}

{}