{
 "public_id": "AIR-2026-0196",
 "incident_id": "2026-08-zenity-pleasefix",
 "date_disclosed": "2026-08-12",
 "date_occurred": null,
 "title": "PleaseFix at Black Hat USA 2026: a 0-click takeover vulnerability class across Claude in Chrome, Comet and Atlas",
 "class": "research_demo",
 "attack_surface": "browser_agent",
 "initial_vector": "indirect_prompt_injection_web_content",
 "agent_capability_abused": [
  "authenticated_browsing",
  "cross_site_action",
  "session_access",
  "page_content_ingestion",
  "local_file_access",
  "password_manager_workflow",
  "cross_domain_authenticated_action",
  "content_ingestion",
  "local_code_execution_in_some_products"
 ],
 "target_product": "Claude in Chrome; Perplexity Comet; ChatGPT Atlas",
 "target_vendor": "Anthropic; Perplexity; OpenAI",
 "autonomy_level": "semi_autonomous",
 "impact_realized": false,
 "impact_type": [
  "account_takeover",
  "data_exfiltration",
  "credential_theft",
  "agent_hijack",
  "remote_code_execution"
 ],
 "blast_radius": "flagship agentic browsers across three vendors",
 "cve": [],
 "taxonomy": {
  "owasp_asi": [
   "ASI01",
   "ASI05",
   "ASI03"
  ],
  "mitre_atlas": [],
  "labels": [
   "conference_demo",
   "agentic_browser",
   "zero_click",
   "vulnerability_class",
   "over_agency",
   "browser_agent",
   "intent_collision",
   "cross_vendor",
   "architectural_not_patchable"
  ]
 },
 "defense_present": "per-vendor agentic-browser safety classifiers",
 "defense_bypassed": true,
 "fix_shipped": "Mixed: some vendors patched, others declined, characterizing the findings as intended functionality",
 "primary_sources": [
  "https://zenity.io/blog/ai-agent-security-black-hat-recap",
  "https://aivillage.org/events/defcon-34/",
  "https://zenity.io/company-overview/newsroom/company-news/zenity-labs-exposes-the-full-scope-of-pleasefix",
  "https://aithority.com/security/zenity-labs-exposes-the-full-scope-of-pleasefix-a-vulnerability-class-enabling-zero-click-attacks-across-leading-agentic-browsers/"
 ],
 "verified_quote": "Pwning Agentic Browsers with PleaseFix: A New Vulnerability Class for 0-Click Takeover",
 "confidence": "high",
 "notes": "Michael Bargury and Stav Cohen (Zenity), Black Hat USA 2026 briefing; Stav Cohen also presented it at DEF CON 34 AI Village on 9 Aug 2026. Zenity's recap (12 Aug 2026) describes '0-click attacks against flagship agentic browsers that achieved account take[over]'. Umbrella record for the Grand Theft Atlas and Claude in Chrome writeups, which are the per-product detail. Sibling briefing: 'Promptware EOD: Skillful Agent Detonation' (Bargury, Sharbat) on malicious agent skills. | Merged from duplicate id `2026-08-blackhat-pwning-agentic-browsers-pleasefix`. Also reported under the titles: 'PleaseFix: zero-click exploit chains across five agentic browsers'; 'PleaseFix: Intent Collision is a zero-click vulnerability class across Claude in Chrome, Gemini in Chrome, Comet, Atlas and Copilot Edge'.",
 "risk_category": "security_fraud",
 "risk_secondary": [
  "privacy"
 ],
 "risk_subcategory": "Prompt Injection",
 "risk_sub_secondary": [
  "Credential & Secret Theft",
  "Remote Code Execution & Sandbox Escape",
  "Unauthorized Access & Account Takeover"
 ],
 "ai_entity": "generative",
 "agency": "agent_acted",
 "agency_debatable": false,
 "agency_reason": "the browser agents took over the live accounts with zero clicks",
 "vector_family": "indirect_prompt_injection",
 "vector_detail": "indirect_prompt_injection_web_content",
 "guardrail_kind": [
  "input_classifier"
 ],
 "guardrail_outcome": "silent",
 "xrefs": {
  "aiid": [],
  "atlas": [],
  "cve": [],
  "ghsa": []
 },
 "primary_asi": "ASI01",
 "agent_framework": "perplexity_comet",
 "model_provider": "multiple",
 "model_name": "",
 "detection_mechanism": "external_researcher",
 "tool_access": "unknown",
 "financial_loss_band": "unknown",
 "eai_category": "data_exfiltration_channels",
 "eai_domain": "privacy",
 "eai_secondary": [
  "credential_theft",
  "privilege_escalation",
  "confused_deputy"
 ],
 "eai_reason": "impact rule: data_exfiltration_channels",
 "asi_curated": [
  "ASI01"
 ],
 "asi_scope": "in_scope",
 "asi_provenance": "curated_plus_rule",
 "asi_reason": "curated: ASI01 | added ASI05 (impact=code_exec), ASI03 (signal=identity)",
 "submitted_by": "EAI Internal"
}