{"id":"GO-2026-5856","revision":"5752f50573ca45f798b8791c5e0ec1f1","records":[{"revision":"5752f50573ca45f798b8791c5e0ec1f1","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-5856","aliases":["BIT-golang-2026-42505","CVE-2026-42505"],"title":"Invoking Encrypted Client Hello privacy leak in crypto/tls","description":"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.","state":0,"publishedAt":"2026-07-07T21:34:47+00:00","modifiedAt":"2026-10-03T10:41:52.186009+00:00","affected":[{"ecosystem":"Go","name":"stdlib","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.25.12"},{"kind":"introduced","version":"1.26.0-0"},{"kind":"fixed","version":"1.26.5"},{"kind":"introduced","version":"1.27.0-0"},{"kind":"fixed","version":"1.27.0-rc.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://go.dev/cl/775960","https://go.dev/issue/79282","https://groups.google.com/g/golang-announce/c/OrmQE_Yp5Sc"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-5856","license":"OSV · upstream source license applies","key":"osv:GO-2026-5856","identifiers":["GO-2026-5856","BIT-golang-2026-42505","CVE-2026-42505"]},"retained":false,"historicalAffected":[]}],"coverage":[]}