{
 "id": "AIR-2026-1400",
 "slug": "echo-response-harmfulness-optimization-based-jailbreak-attac",
 "title": "ECHO: Response Harmfulness Optimization-Based Jailbreak Attack",
 "summary": "Researchers propose ECHO, an optimization-based jailbreak attack that replaces compliance proxies with direct response harmfulness evaluations. The method demonstrates improved capability in bypassing model safety alignments.",
 "type": "attack_on_ai",
 "categories": [
  "jailbreak"
 ],
 "severity": 1,
 "targets": [
  "open_weight_model"
 ],
 "products": [
  "ECHO"
 ],
 "incident_date": "2026-10-19",
 "incident_date_precision": "day",
 "first_reported": "2026-10-19",
 "sources": [
  {
   "url": "https://arxiv.org/abs/2610.23030",
   "publisher": "arXiv",
   "title": "ECHO: Replacing the Compliance Proxy with Response Harmfulness in Optimization-Based Jailbreak Attack",
   "published_at": "2026-10-19"
  }
 ],
 "source_count": 1,
 "confidence": 0.9,
 "status": "published",
 "origin": "news",
 "tags": [
  "jailbreak",
  "optimization",
  "safety-alignment"
 ],
 "created_at": "2026-10-19T05:07:38.588Z",
 "updated_at": "2026-10-19T05:07:38.588Z"
}