Show HN: Harnessing LLM-Prompt Mutation to Build Smart,Automated Fuzz Drivers

Category: security

Tags: fuzzing, llm, security-testing, rust, automated-testing

Score: 8.0/10 (Innovation: 8, Technical: 9, Documentation: 7, Utility: 8)

PromptFuzz is an automated tool that generates high-quality fuzz drivers for libraries by mutating LLM prompts in a feedback loop guided by code coverage. It achieves significantly higher branch coverage than established fuzzers like OSS-Fuzz and has already discovered over 30 confirmed security bugs in widely-used C libraries, making it a strong practical advancement in automated vulnerability discovery.

Target audience: security engineers, software developers, devops

Repository: https://github.com/FuzzAnything/PromptFuzz · Rust · 330 stars

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