microsoft / microsoft/PyRIT

Support H-CoT: Hijacking the Chain-of-Thought to Jailbreak Reasoning Models

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#897 7 comments 0 reactions 1 assignee View on GitHub

@riyosha is already working on this.

Since Feb 15, 2026.

enhancement help wanted
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Description

## Is your feature request related to a problem? Please describe.

I recently learned about the jailbreak method “H-CoT: Hijacking the Chain-of-Thought Safety Reasoning Mechanism to Jailbreak Large Reasoning Models”, a method which has been shown to successfully bypass safety filters in several large reasoning models including OpenAI o1/o3, DeepSeek-R1, and Gemini 2.0 Flash Thinking. It would be great to implement this feature.

Refer:
1. https://github.com/dukeceicenter/jailbreak-reasoning-openai-o1o3-deepseek-r1
2. https://maliciouseducator.org/

## Describe the solution you'd like

Could you provide explicit support or integration for the H-CoT jailbreak method within your repository?

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