The response from the price oracle always assumes 8 decimals (see PoolLib.convertFromUsd) but its never checked if the oracle response has 8 decimals using ChainLinks .decimals() function. At some point, the governor might set up a USD price feed oracle that contains more than 8 decimals leading to inflated prices everywhere.
Recommend checking _aggregator.decimals() == 8 in ChainlinkOracle constructor and changeAggregator.
lucas-manuel (Maple) confirmed:
Nick Johnson (Judge):
