Errata patches for perl have been released for OpenBSD 6.2 and 6.3. Perl's Archive::Tar module could be made to write files outside of its working directory.
Binary updates for the amd64, i386, and arm64 platforms are available via the syspatch utility. Source code patches can be found on the respective errata pages: https://www.openbsd.org/errata62.html https://www.openbsd.org/errata63.html