{
 "public_id": "AIR-2026-0091",
 "incident_id": "2026-04-anthropic-claude-memory-adversarial-image",
 "date_disclosed": "2026-04-17",
 "date_occurred": null,
 "title": "Hacking Claude's memory: a ChatGPT-generated adversarial image persists false memories in Claude Opus 4.7",
 "class": "research_demo",
 "attack_surface": "memory_store",
 "initial_vector": "adversarial_image_prompt_injection",
 "agent_capability_abused": [
  "image_input",
  "memory_write",
  "vision"
 ],
 "target_product": "Claude (Opus 4.7) with memory; OpenAI ChatGPT (used to generate the payload)",
 "target_vendor": "Anthropic; OpenAI",
 "autonomy_level": "assistant",
 "impact_realized": false,
 "impact_type": [
  "memory_poisoning",
  "persistence",
  "integrity_loss",
  "persistent_memory_poisoning",
  "integrity_violation"
 ],
 "blast_radius": "all future conversations of the affected Claude user",
 "cve": [],
 "taxonomy": {
  "owasp_asi": [
   "ASI01",
   "ASI06"
  ],
  "mitre_atlas": [],
  "labels": [
   "memory_poisoning",
   "multimodal_injection",
   "model_vs_model",
   "persistence",
   "adversarial_image",
   "cross_model_attack"
  ]
 },
 "defense_present": "Opus 4.6+ hardening against memory-write injection",
 "defense_bypassed": true,
 "fix_shipped": "the specific adversarial example stopped working within 24 hours of publication; HackerOne ticket (March 2026) closed as a safety issue",
 "primary_sources": [
  "https://embracethered.com/blog/posts/2026/breaking-opus-4.7-with-chatgpt/"
 ],
 "verified_quote": "ChatGPT generated an adversarial image that hijacked my Claude Opus 4.7 to invoke the memory tool and persist false memories",
 "confidence": "high",
 "notes": "Johann Rehberger, 17 Apr 2026, titled 'Breaking Opus 4.7 with ChatGPT (Hacking Claude's Memory)'. ChatGPT builds a puzzle image whose 'solution' asserts fabricated facts about the user; Opus 4.7 solves it and writes the fabrications to memory. Succeeded in 5 of 10 attempts; the model sometimes flagged the content as suspicious and stored it anyway. One model weaponised against another's memory product is the distinctive feature here. | Merged from duplicate id `2026-04-anthropic-claude-memory-image-poisoning`. Also reported as: 'Adversarial image generated by ChatGPT hijacks Claude Opus 4.7 into writing false long-term memories'.",
 "risk_category": "security_fraud",
 "risk_secondary": [],
 "risk_subcategory": "Prompt Injection",
 "risk_sub_secondary": [
  "Persistence & Covert C2"
 ],
 "ai_entity": "generative",
 "agency": "agent_acted",
 "agency_debatable": false,
 "agency_reason": "Opus wrote the fabricated memories via its memory tool",
 "vector_family": "other",
 "vector_detail": "adversarial_image_prompt_injection",
 "guardrail_kind": [
  "unknown"
 ],
 "guardrail_outcome": "silent",
 "xrefs": {
  "aiid": [],
  "atlas": [],
  "cve": [],
  "ghsa": []
 },
 "primary_asi": "ASI01",
 "agent_framework": "unknown",
 "model_provider": "multiple",
 "model_name": "",
 "detection_mechanism": "external_researcher",
 "tool_access": "unknown",
 "financial_loss_band": "unknown",
 "eai_category": "data_and_memory_poisoning",
 "eai_domain": "reliability_and_observability",
 "eai_secondary": [
  "privilege_escalation",
  "confused_deputy"
 ],
 "eai_reason": "impact rule: data_and_memory_poisoning",
 "asi_curated": [
  "ASI01"
 ],
 "asi_scope": "in_scope",
 "asi_provenance": "curated_plus_rule",
 "asi_reason": "curated: ASI01 | added ASI06 (eai_category=data_and_memory_poisoning)",
 "submitted_by": "EAI Internal"
}