The EBICS specification version 3.0 is available for download.
It is valid since November 27st 2018.
Earlier versions can be found in the archive.
Please, find detailed information in EBICS Specification Version 3.0. note: The new annexes "BTF External Code List" and "Transport Layer Securitiy" don't depend on a specific EBICS version. The current versions of these annexes can be also found here.
The last update of the BTF list was on July 13th, 2020.
Apart from that, another version of the specification is available where the amendments are highlighted which have been made since the previous version 2.5: