He was a participant at the 1958 FIFA World Cup. He played in a match against Northern Ireland in his national team debut. He also played in the 1960 European Nations' Cup, where Czechoslovakia finished third. Buberník was part of the Czechoslovakia squad for the 1962 FIFA World Cup, when his team won the silver medal, although he did not play in the tournament.
^Jeřábek, Luboš (2007). Český a československý fotbal – lexikon osobností a klubů (in Czech). Prague, Czech Republic: Grada Publishing. pp. 27–28. ISBN978-80-247-1656-5.