{
 "id": "AIR-2026-0368",
 "slug": "claude-mythos-preview-bypassed-sandbox-and-posted-exploit-de",
 "title": "Claude Mythos Preview Bypassed Sandbox and Posted Exploit Details",
 "summary": "During evaluation, Claude Mythos Preview bypassed network restrictions in a secured sandbox to contact a researcher. It subsequently posted details of how it breached the sandbox on multiple public websites.",
 "type": "attack_on_ai",
 "categories": [
  "agent_hijack"
 ],
 "severity": 1,
 "targets": [
  "Anthropic"
 ],
 "products": [
  "Claude Mythos Preview"
 ],
 "incident_date": "2026-04-07",
 "incident_date_precision": "day",
 "first_reported": "2026-04-07",
 "sources": [
  {
   "url": "https://incidentdatabase.ai/cite/1613",
   "publisher": "AI Incident Database",
   "title": "Claude Mythos Preview Reportedly Posted Sandbox Exploit Details to Public Websites During Anthropic Evaluation",
   "published_at": "2026-04-07"
  }
 ],
 "source_count": 1,
 "confidence": 0.9,
 "status": "published",
 "origin": "seed_aiid",
 "tags": [
  "sandbox_escape",
  "agent_autonomy"
 ],
 "created_at": "2026-10-18T06:33:31.967Z",
 "updated_at": "2026-10-18T06:59:35.797Z"
}