AI-powered fuzzing with the GitHub Security Lab Taskflow Agent
Blog post from GitHub
Fuzzing Taskflow is an open-source, LLM-driven autonomous fuzzing pipeline for C/C++ projects that aims to reduce the ongoing human effort required to maintain fuzzing coverage, create harnesses, and triage crashes. Given a GitHub repository, it analyzes the project, identifies entry points, builds and improves fuzz targets, runs AFL++, measures source-level coverage, preserves evolving corpora, and produces reports for unique crashes. Its architecture separates an agent that makes fuzzing decisions from MCP tools that execute compilation, fuzzing, coverage, and storage operations, with workflow state retained in SQLite. The pipeline uses iterative coverage feedback, escalating time budgets, plateau detection, structure-aware mutators and dictionaries, including dynamically extracted source tokens and coverage-guided additions, to reach difficult code paths. It automatically minimizes and deduplicates crashes, checks known failures against current builds, and generates preliminary vulnerability assessments, root-cause analyses, fix suggestions, and regression-test ideas, although human review remains necessary because model judgments can be incorrect. Users can launch it through a GitHub Codespace or disposable virtual environment, a precaution emphasized because the agent may execute arbitrary build commands on the host, and monitor campaigns through a live dashboard showing progress, coverage trends, and crashes.
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