During March 2026, Calvano focused on enhancing the security and reliability of the facebook/fbthrift repository by addressing a critical heap overflow vulnerability in the Thrift HTTP parser. Using C++ and leveraging expertise in buffer management and security vulnerability mitigation, Calvano introduced overflow checks before buffer resizing in two key code paths. The solution maintained existing error handling patterns by throwing a TTransportException when an overflow was detected, ensuring no API changes were required. The fix was validated through buck2 build, arc lint, and httpparser tests, demonstrating a careful, minimal-risk approach to strengthening the project’s overall security posture.