Flowers are pure white, fragrant, less than 3" across//leaves are small//stems have many small thorns (some big ones, too!)//spreads very aggressively. Branches are no longer than 5' and it has sort of a messy habit. It is seemingly disease & pest free. I was told it was found around an old house foundation in the area of the Quabbin Reservoir, so am assuming it's an old variety. Any ideas?

Is it a once bloomer or does it repeat? It does sound like an old garden rose, but I am not good at rose identification. I hope someone here can name it.