atheris

Installation
SKILL.md

Atheris

Atheris is a coverage-guided Python fuzzer built on libFuzzer. It enables fuzzing of both pure Python code and Python C extensions with integrated AddressSanitizer support for detecting memory corruption issues.

When to Use

Fuzzer Best For Complexity
Atheris Python code and C extensions Low-Medium
Hypothesis Property-based testing Low
python-afl AFL-style fuzzing Medium

Choose Atheris when:

  • Fuzzing pure Python code with coverage guidance
  • Testing Python C extensions for memory corruption
  • Integration with libFuzzer ecosystem is desired
  • AddressSanitizer support is needed

Quick Start

Installs
1
GitHub Stars
2
First Seen
Jul 15, 2026
Security Audits
atheris — lua2147/claude-toolkit-catalog