I was changing my oil yesterday on my 2017 SV, and happened to notice a bolt on the CVT that looked wet. I took a closer look, and noticed it was coming from the output shaft on the engine side of the CVT. There is a rubber seal there where it enters the CVT. Its strange because I have never seen any signs of dripping on my garage floor. I also peeled back the plastic shrouding on the underside right below that and there was nothing pooled up. Going to have to contact the local Nissan dealer. Anyone else notice this?

 

Not on my 17 SL, but this did happen on my 07 Altima SL. Only mechanical issue I ever had. Took it in under warranty. Took only a day to fix. Leak (or seep, like you have) was not evident even after another 140,000 miles. Some seals are defective, most aren't. Good luck.