# antonio-morales/Fuzzing101

An step by step fuzzing tutorial. A GitHub Security Lab initiative

Repository: https://github.com/antonio-morales/Fuzzing101
Canonical: https://ross.abutalabs.com/products/fuzzing101
Homepage: https://securitylab.github.com/
License: Apache-2.0
License Family: permissive
Topics: fuzzing, security, bug-hunting, afl, fuzzilli, fuzzer, afl-fuzz, bugbounty, fuzz-testing, hacking, testing, vulnerabilities, education
Last push: 2026-06-16T09:38:26+00:00

## Health v2 (maintenance only)
Score: 71/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 87, release rhythm 35, longevity 100
- inputs: {"age_days": 1856, "days_push": 78, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3817, forks 422 (observed 2026-08-28T04:08:20.946362+00:00)

## What it is
A step-by-step fuzzing course from GitHub Security Lab with 10 exercises targeting real software like Xpdf, libexif, and Chrome/V8. Learners use AFL++, WinAFL, and Fuzzilli to find real CVEs while covering sanitizers, coverage, harnesses, and instrumentation.

## Use cases
- learn how to fuzz open source software
- find real CVEs with AFL++
- practice writing fuzzing harnesses
- learn to fuzz JavaScript engines with Fuzzilli
- fuzz closed-source Windows applications with WinAFL
- get started in vulnerability research and bug bounty hunting

## When to choose
- you are new to fuzzing and want guided hands-on exercises
- you want to learn AFL++ and related tools on real targets
- you are preparing for security research or bug bounty work

## When to avoid
- you need a production fuzzing tool or framework rather than a course
- you need a Windows or macOS-native tutorial (exercises target Linux)
- you already have advanced fuzzing expertise and need cutting-edge techniques

## Facets
- artifact type: learning-resource
- maturity: stable
- function: fuzzing, penetration-testing, testing, security
- domain: security, tutorials, developer-tools, education
- platform: cli
- tags: fuzzing, afl-plus-plus, tutorial, vulnerability-research, bug-bounty, cve, hands-on-exercises, fuzzilli, winafl, linux

## Member repositories
- antonio-morales/Fuzzing101 (main) score 71

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:20.946362+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:26:30.131625+00:00, confidence not recorded.
  - readme: https://github.com/antonio-morales/Fuzzing101 (fetched 2026-08-28T04:08:20.946362+00:00, sha ddaa5e4ae959)
  - homepage: https://securitylab.github.com/ (fetched 2026-08-29T09:21:37.286474+00:00, sha 8537b2f5cb72)
- Data as of 2026-08-30T08:39:29.467469+00:00.