You could try stick a screw in carefully and pull the broken tenon out, then superglue back together.
Categorically do NOT attempt either of these things on a pipe you care about. I get sent dozens of "rescue cases" a year because of them.
First the screw business: A fastening screw's tapered shape and non-cutting threads will apply massive outward pressure on the tenon, often cracking it. The right tool is a properly-sized tap (they are cylindrical and have threads designed to cut). Then, pulling the tenon out without applying sideways torque to the shank---100% of the force must be axial---requires a slide hammer and a shank support plate. If you don't own or have access to such tools, don't mess with improvised broken tenon removal unless you are willing to accept a significant risk of damaging---or even losing---that particular pipe. Cracked and exploded shanks have no rewind button.
As for superglue, it is designed to wick into voids (like WD-40) and doesn't care if it's the one you intended or not. And even when properly applied, it won't hold indefinitely, resulting in the bowl simply falling off without warning sooner or later. On carpet at home, probably no big deal. On textured concrete or while on the freeway at rush hour, not so much.