Hello,
They are already available under Custom ROM->CyanogenMod
They are not latest cyanogenmod wallpapers. In CM13 thera are new wallpapers.
I'll upload them soon
But FYI, they are same as Google Android Marshmallow wallpapers(check them out)
I've verified them
http://review.cyanogenmod.org/#/c/129371/
http://review.cyanogenmod.org/#/c/129047/
I was on CM13 (titan). There are some new wallpaper.