Worked on the openssl/openssl repository to address a security vulnerability in the HTTP/3 demo server’s URL handling. Focused on C programming and buffer management, the work involved implementing a safe, bounded copy routine that ensures the URL buffer is always NUL-terminated, thereby preventing heap out-of-bounds reads and potential buffer overflows from client-supplied path headers. The patch limited the copied length to MAXURL-1, preserving the trailing NUL byte and maintaining correct string termination across all code paths. This security fix was reviewed and merged by project maintainers, reflecting a careful, security-focused approach to open source development.