This feels like an old school vulnerability. Things like this were the norm in the 90's and early 2000's. It feels weird to see an exploit like this now in a large and well known project, and very weird for it to be in OpenBSD.

It just goes to show, as a user you can make informed choices in what software to use to reduce your security exposure, but that's not enough. You still need to pay attention to new problems that might pop up. No software is guaranteed to be safe in perpetuity.