{"id":"GO-2026-6607","revision":"228e4af918374743ac5b03841b82968b","records":[{"revision":"228e4af918374743ac5b03841b82968b","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-6607","aliases":["BIT-golang-2026-97031","CVE-2026-97031"],"title":"Reject malformed ECH outer extension references in crypto/tls","description":"Multiple ECH outer extension references are not permitted under RFC 9849; previously, a client could send a well-crafted packet that could trigger memory exhaustion in the server process by specifying multiple references.\n\nWe now reject these as malformed and curb the memory amplification vector as a result.","state":0,"publishedAt":"2026-10-08T22:31:09+00:00","modifiedAt":"2026-10-16T09:55:33.2497429+00:00","affected":[{"ecosystem":"Go","name":"stdlib","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.26.9"},{"kind":"introduced","version":"1.27.0-0"},{"kind":"fixed","version":"1.27.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://go.dev/cl/847312","https://go.dev/issue/81855","https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-6607","license":"OSV · upstream source license applies","key":"osv:GO-2026-6607","identifiers":["GO-2026-6607","BIT-golang-2026-97031","CVE-2026-97031"]},"retained":false,"historicalAffected":[]}],"coverage":[]}