Symbiosis Bridge Paused After Exploit Involving Fake Bitcoin Minting

The cross-chain protocol Symbiosis has paused its native Bitcoin bridge following an exploit that saw the unauthorized minting of over 40 billion in synthetic Bitcoin (syBTC). While the protocol has recovered approximately 15 BTC, it is currently conducting an investigation to determine final losses and develop a compensation framework for affected liquidity providers. Security firm Blockaid estimated the attackers generated roughly $336,000 in proceeds. Symbiosis offered a 20% bounty for the return of funds, which expired on September 13, 2026, and plans to release further details on compensation eligibility soon.