116-Page Paper Reveals API Vulnerability: Extracting Encrypted Chain-of-Thought from Frontier LLMs
maksym_andr · x · 2026-08-11
Researchers published a 116-page paper detailing a vulnerability in the APIs of frontier models from OpenAI, Anthropic, and Gemini.
- The Vulnerability: Attackers can exploit it to extract hidden, encrypted raw reasoning (Chain-of-Thought) from the models at scale.
- Security Risks: This exposes the systems to distillation attacks and credential extraction.
- Findings: The study found numerous examples of illegible and unfaithful reasoning, providing evidence that some open-weight models might have been distilled from proprietary frontier models.
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