The cabinet is set to approve the appointment of Blue and White MK Eitan Ginzburg as communications minister.
The appointment will now need to be approved by the Knesset plenum.
Attorney General Avichai Mandelblit last week notified Prime Minister Benjamin Netanyahu and his unity government partner Alternate Prime Minister Benny Gantz that they must speedily appoint permanent ministers to replace six acting positions that are set to expire, including that of communications minister.
Mandelblit warned that the terms of the acting ministers cannot be extended and that the permanent ministers must be approved by the Knesset plenum.
As the unity government between Netanyahu and Gantz collapsed over the failure to pass a state budget, various ministers either resigned or were booted from their posts amid a flurry of lawmakers switching allegiances.
Gantz had held the position of communications minister up until now but under Israeli government laws, an interim minister who replaces one who left the position can only be appointed for three months.