The Uruguay international will offer crucial defensive cover for Andoni Iraola with Giovanni Leoni and Jeremy Jacquet both returning from long-term injuries.
Conor Bradley and Jeremie Frimpong are also struggling to stay fit on a consistent basis at Anfield and Araujo's flexibility to cover at right-back is another vital boost.
Liverpool also have a non-mandatory €55M purchase clause included in the loan deal if he impresses on Merseyside in the 2026/27 campaign.
However, despite the potential of having already played his last game for Barca, his La Blaugrana teammate Fermin Lopez hopes the 27-year-old is back in Catalonia next season.
"I hope he comes back next year."
Araujo's current Barca deal runs until 2031, so a future decision is on the cards in 2027, as he heads off for a new career challenge in England.