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CVE-2026-39836

Estado: AnalizadaAlta (7.5)—

The Dial and LookupPort functions panic on Windows when provided with an input containing a NUL (0).

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Inferido por reglas deterministas a partir del vector CVSS y la CWE. Solo orientativo.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Golang — GO

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2026-39836",
  "cveTags": [],
  "metrics": {
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      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          "options": [
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          "version": "2.0.3",
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          "privilegesRequired": "NONE",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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  "affected": [
    {
      "source": "security@golang.org",
      "affectedData": [
        {
          "vendor": "Go standard library",
          "product": "net",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "1.25.10",
              "versionType": "semver"
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              "status": "affected",
              "version": "1.26.0-0",
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              "versionType": "semver"
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          ],
          "packageName": "net",
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "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"
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              "name": "ListenConfig.Listen"
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            {
              "name": "ListenConfig.ListenPacket"
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              "name": "ListenPacket"
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              "name": "LookupAddr"
            },
            {
              "name": "LookupCNAME"
            },
            {
              "name": "LookupHost"
            },
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              "name": "LookupIP"
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              "name": "LookupMX"
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              "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"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-05-07T20:16:43.593",
  "references": [
    {
      "url": "https://go.dev/cl/775320",
      "tags": [
        "Patch"
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      "source": "security@golang.org"
    },
    {
      "url": "https://go.dev/issue/79006",
      "tags": [
        "Issue Tracking"
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      "tags": [
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
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          "value": "CWE-476"
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Dial and LookupPort functions panic on Windows when provided with an input containing a NUL (0)."
    }
  ],
  "lastModified": "2026-06-17T10:42:40.340",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
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