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CVE-2026-27138 Panic in name constraint checking for malformed certificates in crypto/x509

🗓️ 06 Mar 2026 21:28:14Reported by GoType 
cvelist
 cvelist
🔗 www.cve.org👁 19 Views

Panic in name constraint checks for a chain with empty domain name and excluded constraints during X.509 verification.

Related
Affected
Refs
[
  {
    "vendor": "Go standard library",
    "product": "crypto/x509",
    "collectionURL": "https://pkg.go.dev",
    "packageName": "crypto/x509",
    "versions": [
      {
        "version": "1.26.0-0",
        "lessThan": "1.26.1",
        "status": "affected",
        "versionType": "semver"
      }
    ],
    "programRoutines": [
      {
        "name": "dnsConstraints.query"
      },
      {
        "name": "Certificate.Verify"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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