Cortinarius verrucisporus is a basidiomycete fungus of the large agaric genus Cortinarius. It was described as new to science in 1969 by mycologist Harry Delbert Thiers and Alexander H. Smith. The species is characterized by a long-lasting membranous universal veil. Its edibility is unknown, but it is not recommended due to its similarity to deadly poisonous species. Cortinarius magnivelatus is similar in appearance, but with a white veil and flesh.