{"id":"CVE-2026-46600","sourceIdentifier":"security@golang.org","published":"2026-07-21T20:17:01.213","lastModified":"2026-10-24T19:10:00.127","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"Parsing an invalid SVCB or HTTPS RR can panic when the size of a parameter value overflows the message buffer."},{"lang":"es","value":"Analizar un RR SVCB o HTTPS no válido puede causar un pánico cuando el tamaño de un valor de parámetro desborda el búfer del mensaje."}],"affected":[{"source":"security@golang.org","affectedData":[{"vendor":"Go standard library","product":"net","defaultStatus":"unaffected","collectionURL":"https://pkg.go.dev","packageName":"net","programRoutines":[{"name":"cgoResSearch"},{"name":"LookupCNAME"},{"name":"Resolver.LookupCNAME"}],"versions":[{"version":"1.26.0-0","lessThan":"1.26.6","versionType":"semver","status":"affected"},{"version":"1.27.0-0","lessThan":"1.27.0-rc.3","versionType":"semver","status":"affected"}]},{"vendor":"golang.org/x/net","product":"golang.org/x/net/dns/dnsmessage","defaultStatus":"unaffected","collectionURL":"https://pkg.go.dev","packageName":"golang.org/x/net/dns/dnsmessage","programRoutines":[{"name":"unpackSVCBResource"},{"name":"Message.Unpack"},{"name":"Parser.Additional"},{"name":"Parser.AllAdditionals"},{"name":"Parser.AllAnswers"},{"name":"Parser.AllAuthorities"},{"name":"Parser.Answer"},{"name":"Parser.Authority"},{"name":"Parser.HTTPSResource"},{"name":"Parser.SVCBResource"}],"versions":[{"version":"0","lessThan":"0.56.0","versionType":"semver","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-07-23T15:00:27.171241Z","id":"CVE-2026-46600","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","description":[{"lang":"en","value":"CWE-125"}]}],"references":[{"url":"https://go.dev/cl/786345","source":"security@golang.org"},{"url":"https://go.dev/issue/79795","source":"security@golang.org"},{"url":"https://groups.google.com/g/golang-announce/c/94pEornpRlI","source":"security@golang.org"},{"url":"https://pkg.go.dev/vuln/GO-2026-5942","source":"security@golang.org"}]}