Or Forth with scientific library, bound to the constraints. Put some HTTP library on top and some easy HTML interface from a browser with no JS/CSS3 support at all. It will look rusty but unexploitable.
Enterprise computing with custom software will make a comeback to avoid these pitfalls. I depise OpenJDK/Mono because of patents but at least they come with complete defaults and a 'normal' install it's more than enough to ship a workable application for almost every OS. Ah, well, smartphones. Serious work is never done with these tools, even with high end tables. Maybe commercials/salespeople and that's it.
It's either that... or promoting reproducible environment with Guix everywhere. Your own Guix container, isolated, importing Pip/CPAN/CTAN/NPM/OPAM and who knows else into a manifest file and ready to ship anywhere, either as a Guix package, a Docker container (Guix can do that), a single DEB/RPM, an AppImage ready to launch on any modern GNU/Linux with a desktop and a lot more.
Forth has no standard library for interfacing with SQLite or any other database. You're either using 8th or the C ABI. Therefore, you'll most likely be concatenating SQL queries. Are you disciplined enough to make that properly secure? Do you know all the intricacies?
GForth might have then for sure (Sqlite it's small and supported by even jimtcl) . Also, there's Factor, a Forth inspired language.