---
id: 1274
title: "Extending Ruzzy with LibAFL"
source_domain: blog.trailofbits.com
source_url: "https://blog.trailofbits.com/2026/04/29/extending-ruzzy-with-libafl/"
published_at: "2026-04-29 11:00"
tags: ["appsec", "ruby", "fuzzing", "application-security", "tool-release", "llvm", "libafl", "libfuzzer"]
phying_url: "https://phying.com/item/1274"
lang: en
---

# Extending Ruzzy with LibAFL

## Summary

Trail of Bits added LibAFL support to Ruzzy, its coverage-guided fuzzer for Ruby and Ruby C extensions, via LibAFL's libFuzzer compatibility layer—no changes needed to existing harnesses.

## Intelligence Metadata

- **Sources:** blog.trailofbits.com
- **Published:** 2026-04-29 11:00
- **Original:** https://blog.trailofbits.com/2026/04/29/extending-ruzzy-with-libafl/
- **Phying News:** https://phying.com/item/1274