The woman, identified only by her initials AR, was arrested at a hotel in the city of Surabaya, East Java province, last month with 1.47 kilograms of the drug, the national narcotics agency said.
"Because she smuggled drugs weighing more than five grams, she could face the death penalty," agency spokesman Sumirat Dwiyanto told AFP.
He declined to give further details about the woman or when she was likely to be charged.
The case comes just months after British grandmother Lindsay Sandiford was sentenced to death for attempting to smuggle USD 2.4 million of cocaine into the resort island of Bali.
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The trio are being held at the agency's headquarters in Jakarta, it said.
Foreigners are regularly charged with drugs offences in Indonesia, which has some of the toughest anti-narcotics laws in the world, but most are caught in Bali.
She lost a first appeal against the sentence last month, and has since lodged a last-ditch appeal to Indonesia's top court.
Death row convicts in Indonesia rarely manage to get their sentences lifted. Most spend years in jail before being taken to an isolated location at night and executed by firing squad.