The Makefile contains the Cactus version number as

CCTK_VERSION_MAJOR = 4
CCTK_VERSION_MINOR = 2
CCTK_VERSION_OTHER = 3

which is out of date.

The UserGuide and ReferenceGuide also show Cactus version numbers (though they come as default values in cactus.sty and are the optional argument to the \cactustitle command).

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2336/cactus-version-number-in-makefile-is-out