[3][4][5] It is endemic to West Kalimantan, in the Indonesian part of Borneo near the village of Piasak; it is likely to occur more widely.

[3] The specific name absconditus is Latin for "disguised", "concealed", or "hidden", and refers to this species remaining "undetected" within the Kurixalus appendiculatus group.

[2] Scientists infer that this frog breeds by larval development and that the tadpoles swim in streams, but as of 2021, they have not confirmed this.

It shared this habitat with the frogs Amnirana nicobariensis, Chalcorana raniceps, Hylarana erythraea, Polypedates colletti, Pulchrana baramica, and Limnonectes paramacrodon.

Individuals of Kurixalus absconditus were found clinging to a tree trunk and perched on leaves some 0.70–1.9 m (2–6 ft) above the ground.