CurrentC—a mobile payment system developed by a consortium of major retail chains—has made headlines lately for brazenly blocking Apple Pay transactions. The heat CurrentC faced from that poor strategic move is nothing, though, compared to the trouble the embryonic payment system is in now, thanks to news of a data breach.

CurrentC isn’t even officially launched yet. It’s currently pilot testing with a handful of early adopters, and it’s projected to be available to the masses sometime in 2015. Merchants Customer Exchange (MCX)—the organization behind CurrentC—confirmed Wednesday that it was the victim of a hack, though, compromising the email addresses of the early adopters.

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