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CVE-2026-88648

Status: Awaiting AnalysisUnscored—

Incomplete X.509 implementation in GnuTLS v3.8.13 allows attackers controlling a subordinate Certificate Authority to bypass cross-domain PKI restrictions and issue unauthorized certificates.

CVSS

NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

GNU — GnutlsAI

References

Raw JSON (NVD)

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{
  "id": "CVE-2026-88648",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-10-08T19:20:52.703",
  "references": [
    {
      "url": "https://gist.github.com/lkloliver/1f2a97cb8d0b31aa27b6bd0354358d7d",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://www.rfc-editor.org/rfc/rfc5280#section-4.2.1.10",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://www.rfc-editor.org/rfc/rfc5280#section-6.1.4",
      "source": "cve@mitre.org"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "descriptions": [
    {
      "lang": "en",
      "value": "Incomplete X.509 implementation in GnuTLS v3.8.13 allows attackers controlling a subordinate Certificate Authority to bypass cross-domain PKI restrictions and issue unauthorized certificates."
    }
  ],
  "lastModified": "2026-10-08T21:33:42.423",
  "sourceIdentifier": "cve@mitre.org"
}