Zaibunnisa was a co-accused in the 1993 bomb blasts case and was sentenced to five years imprisonment.
"The only charge on which she has been convicted is possessing some prohibited weapons. It was not disputed that no recovery of any weapon was made from her house. In my respectful opinion she should at least have been given the benefit of doubt," Katju said.
"Zaibunnisa is a widow with various ailments. She had a kidney operation some time back, and has to be screened every six months. She can hardly walk. I do not think she will survive for long in jail. Even on merits, I am of the opinion that she deserves a pardon," he said.