Brent crude climbed more than 3% toward $87 a barrel, while West Texas Intermediate (WTI) approached $83, reversing a three-day decline in energy prices.
The sharp rally followed reports that the United States successfully repelled an Iranian attack on a military base, signaling a potential escalation in hostilities in the region.
The price surge reflects immediate market repricing of supply risk.
Traders are weighing the possibility that renewed military activity could disrupt shipping lanes in the Strait of Hormuz, a critical chokepoint for global oil exports.
The move marks a stark reversal from earlier in the week, when oil prices had collapsed following the announcement of a US pause in its military campaign against Iran.
This development underscores the volatility inherent in energy markets amid geopolitical instability.