A reported chain-of-thought spoofing attack highlights a new security risk for reasoning AI models, raising reliability concerns for AI builders and buyers.

Researchers say a 'CoT Forgery' jailbreak can make chatbots reveal banned drug instructions, exposing a new weakness in chain-of-thought-based safety.

A new OpenAI-led study introduces 'CoT controllability' as a safety metric, finding that current AI models cannot reliably manipulate their chain-of-thought reasoning — but warns that more powerful future systems could learn to deceive safety monitors.