libyaml¶
The fast C library that forms the foundation of many YAML implementations.
Overview¶
libyaml is a YAML parser and emitter written in C. It's designed for speed and efficiency, and serves as the foundation for YAML libraries in many programming languages.
- Repository: github.com/yaml/libyaml
- Language: C
- License: MIT
- Maintainer: The YAML Company
Why libyaml Matters¶
Foundation Layer¶
libyaml provides the parsing engine for:
- pyyaml (Python) - Via C extension
- Ruby YAML (Psych) - Ruby's standard YAML library
- Perl YAML (YAML::XS) - High-performance Perl YAML
- PHP yaml extension - PHP's native YAML support
- Many other language bindings
Performance Critical¶
- Written in C for maximum speed
- Minimal memory footprint
- Suitable for embedded systems
- Optimized for high-throughput applications
YAML Specification Reference¶
- Comprehensive YAML 1.1 implementation
- Reference for implementers
- Extensive test suite
- Standards-compliant
The YAML Company Maintenance¶
Under The YAML Company's stewardship, libyaml receives:
Security First¶
- Regular security audits
- Memory safety improvements
- Rapid vulnerability patching
- Fuzzing and security testing
- YES members get 48-hour early security notifications
Active Development¶
- Bug fixes and stability improvements
- Performance optimizations
- YAML 1.2 specification support
- Compiler and platform compatibility
Professional Support¶
- Responsive to issues and pull requests
- Clear development roadmap
- Support for library consumers
- Integration guidance
Maintenance & Accountability¶
libyaml is professionally maintained by The YAML Company, led by Ingy döt Net, co-creator of YAML.
- Security contact: security@yaml.com
- Disclosure policy: Coordinated disclosure with advance notice to YES members
- Release cadence: Security patches prioritized, feature releases quarterly
Need supply chain documentation for compliance? Learn about the YES Program →
Language Bindings¶
libyaml has official and community bindings for:
| Language | Binding | Status |
|---|---|---|
| Python | pyyaml (C extension) | Official |
| Ruby | Psych | Official |
| Perl | YAML::XS | Community |
| PHP | yaml extension | Community |
| Lua | lua-yaml | Community |
Security¶
libyaml is regularly tested for security:
- Continuous fuzzing with OSS-Fuzz
- Static analysis
- Memory safety testing (Valgrind, AddressSanitizer)
- Security-focused code reviews
Recent security improvements:
- Bounds checking
- Integer overflow protection
- Memory leak fixes
- Stack limit enforcement
Support libyaml¶
libyaml is maintained through the YES Program. YES members get:
- Priority support for libyaml issues
- Early notification of security vulnerabilities
- Influence over roadmap and feature development
- Direct access to maintainers