She was shot by her victim, who was stabbed in the back, police said.
The man was initially treated near the scene of the attack, the Magen David Adom emergency medical service said in a statement.
The stabber, 18, was in critical condition, while the Israeli man was moderately wounded.
“Upon arriving, I saw two patients,” MDA paramedic Aharon Adler told The Times of Israel. “One of them, an approximately 30-year-old male with stab wounds to his upper body, fully conscious; alongside him, a young woman with gunshot wounds. According to him, she came up and stabbed him twice from behind. And then she was shot.
“Her condition was worse than his,” he added.
The two were rushed to the nearby Western Wall plaza for treatment before an ambulance took them to the hospital, Adler said.
Both the stabber and her victim were evacuated to the Hadassah Hospital in the capital’s Ein Kerem neighborhood.
The attack took place near where a Palestinian man stabbed two Israeli men to death Motzoei Shabbos. The wife of one of those murdered and her toddler child were also wounded in that attack, while the stabber was shot dead by security forces.
The stabbing incidents came amid escalating violence and clashes between Israeli security forces and Palestinians in Yerushalayim and the West Bank, where terror attacks killed four Israelis in total in the past week.
Four Palestinians were killed in clashes with Israeli security forces, including two terrorists who stabbed Israelis in Yerushalayim.