This is just a rumor, no confirmation that this is real.
DO NOT START BOOKING YOUR TRIPS! :)
Popload says The Cure will be playing Brazil in June as part of a new South American tour. But at the end it mentions that the tour could slip to 2018. La Rata and Rockaxis have picked up the rumor.
And while we are talking rumors, there's still this one that claimed the band would be playing South Africa, Japan, and South East Asia this year as well. And there was also a rumor, supposedly from Robert, of a show in Scotland. Absolutely none of this is confirmed. So again, don't get your hopes up. Great if it happens, but we'll see.
Thanks, @RosaReyesRomero and @TheCureMexico.