All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
It is permissible for a wife to ask for Khul’ during menses. But the jurists held different opinions on whether or not it is permissible (for a husband) to issue Khul’ when the wife is in her menses. Some of them are of the view that this is permissible, like the Hanbali School of jurisprudence and some others prohibited it like the Maaliki and Shaafi’i Schools of jurisprudence according to their most correct opinion.
Allaah Knows best.