OpenSSL 3.5 Final Release with server-side QUIC Support(openssl-library.org)
openssl-library.org
OpenSSL 3.5 Final Release with server-side QUIC Support
https://openssl-library.org/post/2025-04-08-openssl-35-final-release/
https://openssl-library.org/post/2025-04-08-openssl-35-final-release/
I hope this means that HAProxy will have QUIC 0-rtt support out of the box with OpenSSL.