OpenAI Compaction Flaw Exposed AI Reasoning to Researchers

October 27, 2026 · 8:22 am 2 sources

Image: Infosecurity Magazine

Coverage

Coverage

• OpenAI Compaction Flaw Exposed AI Reasoning to Researchers
  Infosecurity Magazine · October 27, 2026 16:00
  Researchers uncovered an OpenAI API flaw that exposed hidden AI reasoning traces, prompting a fix and a $6000 bug bounty reward

More coverage

• OpenAI Compaction Flaw Let Researchers Bypass Hidden Reasoning Protections
  The Hacker News · October 27, 2026 08:22
  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…