{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-39836", "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "state": "PUBLISHED", "assignerShortName": "Go", "dateReserved": "2026-04-07T18:13:03.529Z", "datePublished": "2026-05-07T19:41:18.300Z", "dateUpdated": "2026-05-07T19:41:18.300Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc", "shortName": "Go", "dateUpdated": "2026-05-07T19:41:18.300Z"}, "title": "Panic in Dial and LookupPort when handling NUL byte on Windows in net", "descriptions": [{"lang": "en", "value": "The Dial and LookupPort functions panic on Windows when provided with an input containing a NUL (0)."}], "affected": [{"vendor": "Go standard library", "product": "net", "collectionURL": "https://pkg.go.dev", "packageName": "net", "versions": [{"version": "0", "lessThan": "1.25.10", "status": "affected", "versionType": "semver"}, {"version": "1.26.0-0", "lessThan": "1.26.3", "status": "affected", "versionType": "semver"}], "programRoutines": [{"name": "Resolver.lookupPort"}, {"name": "Resolver.lookupAddr"}, {"name": "Resolver.lookupTXT"}, {"name": "Resolver.lookupNS"}, {"name": "Resolver.lookupMX"}, {"name": "Resolver.lookupSRV"}, {"name": "Dial"}, {"name": "DialTimeout"}, {"name": "Dialer.Dial"}, {"name": "Dialer.DialContext"}, {"name": "Listen"}, {"name": "ListenConfig.Listen"}, {"name": "ListenConfig.ListenPacket"}, {"name": "ListenPacket"}, {"name": "LookupAddr"}, {"name": "LookupCNAME"}, {"name": "LookupHost"}, {"name": "LookupIP"}, {"name": "LookupMX"}, {"name": "LookupNS"}, {"name": "LookupPort"}, {"name": "LookupSRV"}, {"name": "LookupTXT"}, {"name": "ResolveIPAddr"}, {"name": "ResolveTCPAddr"}, {"name": "ResolveUDPAddr"}, {"name": "Resolver.LookupAddr"}, {"name": "Resolver.LookupCNAME"}, {"name": "Resolver.LookupHost"}, {"name": "Resolver.LookupIP"}, {"name": "Resolver.LookupIPAddr"}, {"name": "Resolver.LookupMX"}, {"name": "Resolver.LookupNS"}, {"name": "Resolver.LookupNetIP"}, {"name": "Resolver.LookupPort"}, {"name": "Resolver.LookupSRV"}, {"name": "Resolver.LookupTXT"}], "defaultStatus": "unaffected"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-248: Uncaught Exception"}]}], "references": [{"url": "https://go.dev/issue/79006"}, {"url": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M"}, {"url": "https://go.dev/cl/775320"}, {"url": "https://pkg.go.dev/vuln/GO-2026-4971"}]}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "The Dial and LookupPort functions panic on Windows when provided with an input containing a NUL (0)."}], "id": "CVE-2026-39836", "lastModified": "2026-05-07T20:38:04.860", "metrics": {}, "published": "2026-05-07T20:16:43.593", "references": [{"source": "security@golang.org", "url": "https://go.dev/cl/775320"}, {"source": "security@golang.org", "url": "https://go.dev/issue/79006"}, {"source": "security@golang.org", "url": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M"}, {"source": "security@golang.org", "url": "https://pkg.go.dev/vuln/GO-2026-4971"}], "sourceIdentifier": "security@golang.org", "vulnStatus": "Awaiting Analysis"}

{}

{"created": "2026-05-07T21:30:25.964302+00:00", "updated": "2026-05-07T21:30:25.964312+00:00", "vendors": [], "weaknesses": ["CWE-20"]}