OpenSSL 3.4 Series Release Notes The major changes and known issues for the 3.4 branch of the OpenSSL toolkit are summarised below. The contents reflect the current state of the NEWS file inside the git repository. More details can be found in the ChangeLog. Major changes between OpenSSL 3.3 and OpenSSL 3.4.0 [22 Oct 2024] OpenSSL 3.4.0 is a feature release adding significant new functionality to OpenSSL. This release incorporates the following potentially significant or incompatible changes: