{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-42505", "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "state": "PUBLISHED", "assignerShortName": "Go", "dateReserved": "2026-04-28T00:21:12.792Z", "datePublished": "2026-07-08T15:46:33.407Z", "dateUpdated": "2026-07-08T15:46:33.407Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "shortName": "Go", "dateUpdated": "2026-07-08T15:46:33.407Z"}, "title": "Invoking Encrypted Client Hello privacy leak in crypto/tls", "descriptions": [{"lang": "en", "value": "Handshakes which used Encrypted Client Hello could be de-anonymized by a passive network observer due to a disclosure of pre-shared key identities in the unencrypted client hello."}], "affected": [{"vendor": "Go standard library", "product": "crypto/tls", "collectionURL": "https://pkg.go.dev", "packageName": "crypto/tls", "versions": [{"version": "0", "lessThan": "1.25.12", "status": "affected", "versionType": "semver"}, {"version": "1.26.0-0", "lessThan": "1.26.5", "status": "affected", "versionType": "semver"}, {"version": "1.27.0-0", "lessThan": "1.27.0-rc.2", "status": "affected", "versionType": "semver"}], "programRoutines": [{"name": "clientHelloMsg.marshalMsg"}, {"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.SendSessionTicket"}, {"name": "QUICConn.Start"}], "defaultStatus": "unaffected"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-201: Insertion of Sensitive Information Into Sent Data"}]}], "references": [{"url": "https://go.dev/cl/775960"}, {"url": "https://go.dev/issue/79282"}, {"url": "https://groups.google.com/g/golang-announce/c/OrmQE_Yp5Sc"}, {"url": "https://pkg.go.dev/vuln/GO-2026-5856"}], "credits": [{"lang": "en", "value": "Coia Prant (github.com/rbqvq)"}]}}}

{}

{}

{}

{}