Tenable Jailbreaks OpenAI’s GPT-5 Within 24 Hours, Bypassing New Safety Features

New Delhi, August 2025 -  Just 24 hours after OpenAI launched its highly anticipated GPT?5 model with promises of “significantly more sophisticated” prompt safety, exposure management company Tenable has successfully jailbroken the platform, compelling it to provide detailed instructions on how to build a Molotov cocktail.

On August 7, 2025, OpenAI unveiled GPT?5, touting its enhanced guardrails designed to prevent the model from being used for illegal or harmful purposes. However, using a social engineering method known as the crescendo technique, Tenable researchers bypassed these safety protocols in just four simple prompts by posing as a history student interested in the historical context and recipe of the incendiary device.

The successful jailbreak highlights a critical security gap in the latest generation of AI models, demonstrating that despite developer claims, they remain vulnerable to manipulation for malicious purposes. The findings from Tenable documented in this blog join a growing chorus of reports from other researchers and users documenting similar jailbreaks, hallucinations, and other quality issues with GPT?5 since its release.

"The ease with which we bypassed GPT?5's new safety protocols proves that even the most advanced AI is not foolproof,” said Tomer Avni, VP, Product Management at Tenable. “This creates a significant danger for organisations where these tools are being rapidly adopted by employees, often without oversight. Without proper visibility and governance, businesses are unknowingly exposed to serious security, ethical, and compliance risks. This incident is a clear call for a dedicated AI exposure management strategy to secure every model in use."

While OpenAI has stated it is implementing fixes, the immediate vulnerability of its flagship product proves that organisations cannot rely solely on AI models' built-in safety features. It provides further evidence that solutions like Tenable AI Exposure are important for gaining control over the AI platforms organisations use, consume, and build, ensuring that all AI use is responsible, secure, and compliant with global regulations.

Read the full blog here.

About Tenable

Tenable® is the exposure management company, exposing and closing the cybersecurity gaps that erode business value, reputation and trust. The company’s AI-powered exposure management platform radically unifies security visibility, insight and action across the attack surface, equipping modern organizations to protect against attacks from IT infrastructure to cloud environments to critical infrastructure and everywhere in between. By protecting enterprises from security exposure, Tenable reduces business risk for more than 44,000 customers around the globe. Learn more at tenable.com.