Add Model Context Protocol (MCP) Python/Atheris fuzzer #14077
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This adds a new OSS-Fuzz project for the Model Context Protocol (MCP).
Target repository: https://github.com/modelcontextprotocol/modelcontextprotocol
Language/engine: Python 3 with Atheris (libFuzzer)
Fuzz target: Validates fuzzed JSON documents against the official MCP JSON Schema
Files:
projects/modelcontextprotocol/Dockerfile
projects/modelcontextprotocol/build.sh
projects/modelcontextprotocol/project.yaml
projects/modelcontextprotocol/mcp_schema_fuzzer.py
Contact:
primary_contact: [email protected]
Help URL:
https://github.com/modelcontextprotocol/modelcontextprotocol/issues
Notes:
The fuzzer parses fuzz input as JSON and validates it against the MCP schema using jsonschema. Unexpected exceptions or crashes are reported.
The build uses PyInstaller for a hermetic binary. The wrapper sets MCP_SCHEMA_PATH and places schema.json adjacent to the binary.