Symbiosis Hack: Check Your Bridged Bitcoin Now

If you have sent Bitcoin across a bridge onto another blockchain, what you hold on the far side is no longer Bitcoin but a claim on it. On September 11, 2026, an attacker on the cross-chain protocol Symbiosis created exactly that claim out of thin air. The damage in real money stayed small, at roughly $336,000. The question that matters for you is a different one: can you still reach your balance? We queried the provider's own interface on September 12, and the answer is not uniform. One direction is suspended, the other is running.

What happened at Symbiosis on September 11, 2026

Symbiosis is a cross-chain protocol: software that moves balances between different blockchains without requiring you to hold an account at an exchange. By its own listing, the protocol connects dozens of networks, among them Bitcoin, Ethereum, BNB Chain, Tron and TON.

At around 04:28 UTC the team spotted an attack on its Bitcoin bridge. According to the reporting, the response was immediate: Symbiosis halted all BTC routing while leaving the remaining connections in service. The weakness sat in a contract called BridgeV2, which accepted a malformed message and then minted tokens that had not a single real Bitcoin behind them.