{
 "public_id": "AIR-2025-0160",
 "incident_id": "2025-10-anthropic-claude-pirate",
 "date_disclosed": "2025-10-28",
 "date_occurred": null,
 "title": "Claude Pirate: abusing Anthropic's own Files API as the exfiltration channel out of the Claude sandbox",
 "class": "responsible_disclosure",
 "attack_surface": "consumer_chatbot",
 "initial_vector": "indirect_prompt_injection_document",
 "agent_capability_abused": [
  "code_execution",
  "network_egress",
  "file_read"
 ],
 "target_product": "Claude with Code Interpreter and network access",
 "target_vendor": "Anthropic",
 "autonomy_level": "assistant",
 "impact_realized": false,
 "impact_type": [
  "data_exfiltration"
 ],
 "blast_radius": "Claude users with the default 'Package managers only' egress setting",
 "cve": [],
 "taxonomy": {
  "owasp_asi": [
   "ASI01",
   "ASI05"
  ],
  "mitre_atlas": [],
  "labels": [
   "allowlist_abuse",
   "living_off_the_land",
   "sandbox_egress",
   "indirect_prompt_injection"
  ]
 },
 "defense_present": "network egress allowlist restricted to package managers, which still included api.anthropic.com",
 "defense_bypassed": true,
 "fix_shipped": "not stated; Anthropic first closed the HackerOne report as out of scope on 2025-10-25, then confirmed on 2025-10-30 that data exfiltration should be in scope",
 "primary_sources": [
  "https://embracethered.com/blog/posts/2025/claude-abusing-network-access-and-anthropic-api-for-data-exfiltration/"
 ],
 "verified_quote": "Rather than leaking data via chat API, there is a Files API, which allows uploading entire files to Claude.",
 "confidence": "high",
 "notes": "Up to 30MB per upload, sent to an attacker-controlled Anthropic account using attacker-supplied API credentials.",
 "risk_category": "privacy",
 "risk_secondary": [],
 "risk_subcategory": "Data Exfiltration via Context",
 "risk_sub_secondary": [],
 "ai_entity": "generative",
 "agency": "agent_acted",
 "agency_debatable": false,
 "agency_reason": "the agent uploaded up to 30MB to the attacker's Anthropic account",
 "vector_family": "indirect_prompt_injection",
 "vector_detail": "indirect_prompt_injection_document",
 "guardrail_kind": [
  "permission_scope"
 ],
 "guardrail_outcome": "silent",
 "xrefs": {
  "aiid": [],
  "atlas": [],
  "cve": [],
  "ghsa": []
 },
 "primary_asi": "ASI01",
 "agent_framework": "unknown",
 "model_provider": "anthropic",
 "model_name": "",
 "detection_mechanism": "external_researcher",
 "tool_access": "unknown",
 "financial_loss_band": "unknown",
 "eai_category": "data_exfiltration_channels",
 "eai_domain": "privacy",
 "eai_secondary": [
  "confused_deputy"
 ],
 "eai_reason": "subcategory: Data Exfiltration via Context",
 "asi_curated": [
  "ASI01"
 ],
 "asi_scope": "in_scope",
 "asi_provenance": "curated_plus_rule",
 "asi_reason": "curated: ASI01 | added ASI05 (vector=code_exec)",
 "submitted_by": "EAI Internal"
}