The 2020 Corruption index has marked Lebanon as highly corrupt and ranked it 149th (out of 180) with a score of 25/100. Other countries with a similar ranking include Iran, Guatemala, Nigeria, Mozambique and Cameroon. As far as Arab countries are concerned, UAE is the least corrupt country followed by Qatar, Oman & Saudi Arabia.
Here are the rankings of Arab countries:
United Arab Emirates 21
Qatar 30
Oman 49
Saudi Arabia 52
Jordan 60
Bahrain 78
Kuwait 78
Egypt 117
Lebanon 149
Iraq 160
Sudan 174
Yemen 176
Syria 178
South Sudan 179