Answered by Shaykh Faraz Rabbani
Is cutting nails and hair allowed in state of major impurity (Janabah)?
Walaikum assalam wa rahmatullah,
It is permitted, but somewhat disliked. [Hashiyat al-Tahtawi `ala Maraqi al-Falah; al-Hadiyya al-`Ala’iyya; al-Fatawa al-Hindiyya]
Wassalam,
Faraz Rabbani