{
  "same_root_cause": true,
  "same_root_cause_confidence": "high",
  "same_surface": true,
  "same_surface_confidence": "high",
  "same_trust_boundary": true,
  "explanation": "The tested variants all target the same root cause as the parent claim: the webhook URL is attacker-controlled input that the server later uses as a destination for an outbound HTTP POST. The same trust boundary is crossed (authenticated remote user -> server -> internal network). No distinct code path or sink was found; the only candidate surface was the same /api/webhook and /api/application/webhook endpoints.",
  "parent_root_cause": "WebhookController.validateURL() and WebhookSenderImpl.validateURL() only performed syntactic URL validation (new URL(...).toURI()) with no IP-range, DNS, or redirect protection, allowing authenticated users to register internal webhook URLs that the alarm batch job would then POST to.",
  "variant_root_cause": "Same as parent. The variant analysis attempted to find alternative URL encodings, DNS-rebinding hostnames, IPv6/NAT64 forms, or alternate endpoints that would still reach the same vulnerable sink. None succeeded because the fix validates the destination at both registration and DNS-resolution time.",
  "primary_anchor": {
    "file_path": "webhook/src/main/java/com/navercorp/pinpoint/web/webhook/support/WebhookUrlValidator.java",
    "line_start": 1,
    "line_end": 283
  },
  "secondary_anchors": [
    {
      "file_path": "batch-alarmsender/src/main/java/com/navercorp/pinpoint/batch/alarm/sender/WebhookDnsResolver.java",
      "line_start": 1,
      "line_end": 62
    }
  ]
}