A lot of ports are pledge/unveiled; and there are malloc settings which don't let rogue/badly written operations misbehave as they would do in the rest of BSD's or any GNU/Linux distro.

https://man.openbsd.org/OpenBSD-5.3/man5/malloc.conf.5

Hint: https://richardlupton.com/posts/openbsd-malloc-options/

Detox might crash. A lot.