Vernescu also won eleven medals at the ICF Canoe Sprint World Championships with four golds (K-1 500 m: 1963, 1966; K-1 4×500 m: 1963, K-2 500 m: 1966), five silvers (K-1 1000 m: 1963, K-1 4×500 m: 1970, 1971, K-2 500 m: 1966, 1970; K-2 1000 m: 1966), and one bronze (K-1 4×500 m: 1966).