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Parsing an invalid SVCB or HTTPS RR can panic in golang.org/x/net/dns/dnsmessage

Exact source revision recorded 23 Oct 2026 15:48:27 UTC. It does not establish the source's current position. Latest evidence.

cve-program · CVE-2026-46600

Published

net

https://pkg.go.dev

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "Go standard library",
                    "product": "net",
                    "collectionURL": "https://pkg.go.dev",
                    "packageName": "net",
                    "versions": [
                        {
                            "version": "1.26.0-0",
                            "lessThan": "1.26.6",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "1.27.0-0",
                            "lessThan": "1.27.0-rc.3",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ],
                    "programRoutines": [
                        {
                            "name": "cgoResSearch"
                        },
                        {
                            "name": "LookupCNAME"
                        },
                        {
                            "name": "Resolver.LookupCNAME"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

golang.org/x/net/dns/dnsmessage

https://pkg.go.dev

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "golang.org/x/net",
                    "product": "golang.org/x/net/dns/dnsmessage",
                    "collectionURL": "https://pkg.go.dev",
                    "packageName": "golang.org/x/net/dns/dnsmessage",
                    "versions": [
                        {
                            "version": "0",
                            "lessThan": "0.56.0",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ],
                    "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"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON

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Sources read 7 Nov 23:01 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current