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Cybersecurity watch

OpenAI Compaction Flaw Let Researchers Bypass Hidden Reasoning Protections

The Hacker News

Why it matters

This page references a cybersecurity signal published by The Hacker News. It helps CISOs, DPOs, IT leaders, infrastructure teams, SMBs and enterprise accounts track vulnerabilities, alerts and trends that may affect security, compliance or system resilience.

Unix Consulting read

This signal relates to AI usage, assistants, models or data handled by these systems. It should be read through a governance lens: which data enters the tool, which access is granted and which traces remain auditable.

Watch points

  • Sensitive data sent to AI tools
  • Connectors, permissions and access logs
  • Internal rules for assistants, agents and local LLMs

Recommended action

Review handled data, connectors and available logs before authorizing or expanding the AI usage concerned.

Relevant for

DPOs, CISOs, IT leaders, innovation teams, exposed business units and AI compliance owners.

Source 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...

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