Apocryphal for most sects. Heretical for Rabbanic Judaism.
The most interesting thing about it I think is that it was thought lost for centuries, but there was a well-known translation in Ethiopian. When the greater Christian population heard about it, it was assumed to be a forgery, but it was still studied and translated.
It wasn’t verified as “authentic” until the discovery of the Dead Sea Scrolls in the 1950s, where ancient Greek and Aramaic copies were discovered that match the Ethiopian translation, establishing the provenance of the Ethiopian version.