{
  "claim_outcome": "confirmed",
  "claim_block_reason": null,
  "repro_result": "confirmed",
  "validated_surface": "library_api",
  "evidence_scope": "isolated_harness",
  "claimed_impact_class": "dos",
  "observed_impact_class": "assertion_abort",
  "exploitability_confidence": "high",
  "attacker_controlled_input": "email header line with __proto__ as key",
  "trigger_path": "Header.parse() -> _add_header() with __proto__ key",
  "end_to_end_target_reached": true,
  "sanitizer_used": false,
  "crash_observed": true,
  "read_write_primitive_observed": false,
  "exploit_chain_demonstrated": false,
  "blocking_mitigation": null,
  "inferred": false
}