{"id":"GO-2026-5015","summary":"Invoking server panic during CheckHostKey/Authenticate in golang.org/x/crypto/ssh","details":"SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate. CertChecker now returns an error instead of panicking when these callbacks are nil.","aliases":["CVE-2026-39835"],"modified":"2026-05-22T02:30:20.667214785Z","published":"2026-05-22T02:08:34Z","database_specific":{"review_status":"REVIEWED","url":"https://pkg.go.dev/vuln/GO-2026-5015"},"references":[{"type":"REPORT","url":"https://go.dev/issue/79563"},{"type":"WEB","url":"https://groups.google.com/g/golang-announce/c/a082jnz-LvI"},{"type":"FIX","url":"https://go.dev/cl/781660"}],"affected":[{"package":{"name":"golang.org/x/crypto","ecosystem":"Go","purl":"pkg:golang/golang.org/x/crypto"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.52.0"}]}],"ecosystem_specific":{"imports":[{"path":"golang.org/x/crypto/ssh","symbols":["CertChecker.Authenticate","CertChecker.CheckHostKey"]}]},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2026-5015.json"}}],"schema_version":"1.7.5","credits":[{"name":"NCC Group Cryptography Services, sponsored by Teleport"}]}