Binaries for Bitcoin Core version v27.0rc1 are available from:
https://bitcoincore.org/bin/bitcoin-core-27.0/test.rc1/
Source code can be found in git under the signed tag
https://github.com/bitcoin/bitcoin/tree/v27.0rc1
This is a release candidate for a new major version release.
Preliminary release notes for the release can be found here:
https://github.com/bitcoin-core/bitcoin-devwiki/wiki/27.0-Release-Notes-Draft
Release candidates are test versions for releases.
When no critical problems are found, this release candidate
will be tagged as v27.0.