The Republic Of Ireland international is, apparently, keen to link-up again with his former Academy boss Paul Hart, according to a report in the Sunday Mirror.
The only stumbling block are his wages, believed to be £26k a week, as Forest are only wanting to contribute £3k a week to enable him to join on a three-month-loan.
Leeds seem insistent on £5k and that could jeopardise any move.
Harte is currently serving a three-game-ban for a sending off against Liverpool reserves.