Jonathan Mathías Cubero Rieta (born 15 January 1994) is a Uruguayan professional footballer who plays for Cerro.

Cubero started his career playing with Cerro in 2010.

During 2011, Cubero played with the Uruguayan national under-17 football team at the 2011 FIFA U-17 World Cup in Mexico, where he was chosen the best goalkeeper of the tournament.

Previously, he played the 2011 South American Under-17 Football Championship in Ecuador.

In 2011, he was named to participate in the Uruguay national football team under-22 squad for the 2011 Pan American Games.