FKIE_CVE-2026-27138

Vulnerability from fkie_nvd - Published: 2026-03-06 22:16 - Updated: 2026-03-10 18:18
Severity ?
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Certificate verification can panic when a certificate in the chain has an empty DNS name and another certificate in the chain has excluded name constraints. This can crash programs that are either directly verifying X.509 certificate chains, or those that use TLS.
References
security@golang.orghttps://go.dev/cl/752183
security@golang.orghttps://go.dev/issue/77953
security@golang.orghttps://groups.google.com/g/golang-announce/c/EdhZqrQ98hk
security@golang.orghttps://pkg.go.dev/vuln/GO-2026-4600
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Certificate verification can panic when a certificate in the chain has an empty DNS name and another certificate in the chain has excluded name constraints. This can crash programs that are either directly verifying X.509 certificate chains, or those that use TLS."
    },
    {
      "lang": "es",
      "value": "La verificaci\u00f3n de certificados puede entrar en p\u00e1nico cuando un certificado en la cadena tiene un nombre DNS vac\u00edo y otro certificado en la cadena tiene restricciones de nombre excluidas. Esto puede bloquear programas que est\u00e1n verificando directamente cadenas de certificados X.509, o aquellos que usan TLS."
    }
  ],
  "id": "CVE-2026-27138",
  "lastModified": "2026-03-10T18:18:44.420",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-06T22:16:00.963",
  "references": [
    {
      "source": "security@golang.org",
      "url": "https://go.dev/cl/752183"
    },
    {
      "source": "security@golang.org",
      "url": "https://go.dev/issue/77953"
    },
    {
      "source": "security@golang.org",
      "url": "https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk"
    },
    {
      "source": "security@golang.org",
      "url": "https://pkg.go.dev/vuln/GO-2026-4600"
    }
  ],
  "sourceIdentifier": "security@golang.org",
  "vulnStatus": "Awaiting Analysis"
}


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