Version 7.3 has just been released. It fixes a couple of security issues in the peer-to-peer layer. Full changelog and update instructions are available on the version 7 release page: http://tezos.gitlab.io/releases/version-7.html
The Git tag for this release is v7.3 and the corresponding commit hash is ba45727cadd0416936fbd49400bcc986a55064ca . Branch latest-release now points to this new tag.