
An attacker exploited two software bugs in the Symbiosis DeFi bridge to turn 25 cents worth of bitcoin into more than 46 billion unbacked syBTC — over 2,000 times Bitcoin's maximum supply. Symbiosis estimates preliminary losses at 9.97 BTC. The exploit highlights the risk of cascading vulnerabilities in cross-chain bridge infrastructure where small initial deposits can be inflated into massive unbacked positions.
CoinDesk