{
  "id": 16735863,
  "title": "OpenAI Compaction Flaw Let Researchers Bypass Hidden Reasoning Protections",
  "url": "https://urgent.news/2026/10/27/openai-compaction-flaw-let-researchers-bypass-hidden-reasoning",
  "topic": "ai",
  "section": "AI",
  "published": "2026-10-27T08:22:43.000Z",
  "source": {
    "name": "The Hacker News",
    "slug": "the-hacker-news",
    "url": "https://thehackernews.com/2026/10/openai-compaction-flaw-let-researchers.html"
  },
  "original_language": "en",
  "account": null,
  "summary": "OpenAI's compaction feature, which shrinks a long conversation to save space, could be turned into a way to copy a model's hidden reasoning out in plain text, security firm Xint has shown. OpenAI's reasoning models work through a problem before answering, and the service normally returns only the raw reasoning as an encrypted item the user cannot read. The method got past",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}