UK Researchers Find 'Universal Jailbreak' Unlocks Dangerous Cyber Capabilities in OpenAI GPT-5.6

A UK research institution discovered a 'universal jailbreak' method that unlocks dangerous cyber capabilities in OpenAI's latest model GPT-5.6. Unlike specific prompts, this jailbreak exploits the model's own security vulnerabilities, enabling it to execute unauthorized network attack instructions. Researchers warn that malicious actors could use this to launch automated attacks on critical infrastructure. For developers and enterprise security teams integrating GPT-5.6 API, this means reassessing model usage boundaries and deploying additional input validation and sandboxing. OpenAI has not released an official fix; it is recommended to temporarily restrict the model's network access and monitor unusual API calls.