If, through no fault of your own, you miss a connection on a ticket sold to you in a single transaction, then the airline is responsible for rebooking you. In most cases this will mean a flight later the same day - most routes are served more than once daily. If it's a route that AF flies only once a day, then they will see if there are any options to get you there the same day on partner airlines. If, however, there is no same-day option available or forthcoming from Air France, they will rebook you on the next available flight and either provide a hotel voucher at the transfer desk where you query your ticket, or if they cannot provide you a hotel voucher, will direct you book and pay for a hotel yourself which they will later reimburse after you lodge a reimbursement request online. Don't automatically just wander off and book your own hotel without first checking what's available from AF.

If your onward journey from CDG is on a different ticket than the ticket that got you to CDG, then you alone are fully responsible for the consequences of missing the flight, even if the cause of the delay is entirely the airline's fault. It makes no difference if the arriving flight, and the departing flight, are on the same airline; for you to be protected, the flights have to also have been issued together on the same ticket. Unless this second ticket is an expensive, fully-flexible ticket, that almost certainly means forfeiture of the entire second ticket. It is not recommended to book travel in this manner (separate tickets with little or no slack built in to cope with delays).

90 minutes is an eminently-doable connection at CDG (so long as you are not self-connecting on separate tickets). Except for 2E-2G connections (80 mins), the minimum connection time at CDG is currently back to 60 minutes, after the summer peak.