The National Investigation Agency (NIA) received the report of the test carried out on August 18 recently.
Official sources said the report from the Central Forensic Science Laboratory (CFSL) found "no discrepancies" during the test on Naved, 21, who hails from Faisalabad in Pakistan.
During his polygraph test, Naved replied "properly and to the satisfaction" of the interrogators, sources said.
Naved was earlier claimed to have made "contradictory and misleading" statements about his Indian contacts and the route taken by his group to infiltrate India.
The Army was also keen on knowing about the route taken by him and three others while infiltrating India.
He is at present in judicial custody after recording his confessional statement before a magistrate in Jammu last week.
The NIA has also preserved DNA and voice samples of Naved, who was overpowered by the locals following the attack, while his accomplice Mohammed Noman alias Momin was killed in retaliatory firing by the BSF.
The driver, said to be an overground operative of the banned LeT, is accused of arranging logistics including transportation, accommodation and food for Naved and three other LeT militants, who infiltrated the Valley from Gulmarg sector in June this year.
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