Hacker turns 25 cents of BTC into $46B in fake tokens on DeFi bridge

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.