Err..it's a bag made from fabric, why would anyone want to use glue, nuts and bolts or rivets?
As already said, use ordinary thread and needle to sew it back, should take a few minutes. I don't think you would even need a thimble or pliers unless the material's really thick.
If there's a plastic liner inside and if it doesn't come out, you can make holes for sewing with a awl or similar pointed tool.