The Belgian side have an option to buy the attacking midfielder in the summer for a six-figure fee.
Henderson has made 56 appearances for the Club since making the switch from Celtic in January 2022, and has contributed to 10 goals (scoring five and setting up five).
So far this season his game-time has been limited, only making one appearance in all competitions.
He will now join up with K.V. Oostende who compete in the second-tier of Belgian football.
On the loan move, Hibernian FC Manager Lee Johnson commented: “We wish Hendo all the best during his loan spell in Belgium. This gives him the opportunity to gain regular game-time as K.V. Oostende look to bounce straight back into the top-tier of Belgian football.”
