A teenager has been stabbed with a machete in a brutal attack at a house party.

Emergency services were called to Chifley, in Sydney’s eastern suburbs, about 8.25pm on Saturday to reports of a brawl.

Police arrived at the Carnegie Court home to find a 16-year-old boy with lacerations.

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The teenager was treated for cuts to his back and legs and taken to Royal Prince Alfred Hospital in a stable condition.

It is understood five males brandishing machetes stormed the party, before slashing the 16-year-old boy..

The five males, who were not invited to the party, left the scene before police arrived.

A crime scene was set up at the home and police have launched an investigation.

Anyone with information about the brawl or was in the area around the time with dash camera footage is urged to contact Maroubra Police Station or Crime Stoppers on 1800 333 000.