What is the authenticity of the narration stating that Prophet Yusuf (عليه السلام) married Zulaikha after his release from prison?

The marriage of Prophet Yusuf (Joseph), peace be upon him, to the wife of Al-Aziz (Zulaikha) has not been proven by any evidence. What has been narrated in this regard may be from the Israiliyyat (tales from Jewish tradition), which are better to disregard. Whether he married her or not, no legal ruling depends on it.