Upbit Discloses Wallet Vulnerability That Could Have Exposed Private Keys Following $30M Hack

South Korean cryptocurrency exchange Upbit identified a critical security flaw in its internal wallet system that could have allowed attackers to derive private keys from publicly visible blockchain transaction data. The vulnerability was discovered during an emergency audit following a $30 million theft on November 27. The exchange has not confirmed whether the flaw was directly exploited in the breach, but has committed to covering all customer losses using its own reserves.