Symbiosis Recovers 15 BTC After Bitcoin Bridge Exploit, Offers 20% Bounty

Cross-chain liquidity protocol Symbiosis says it recovered roughly 15 BTC and offered the attacker a 20% white-hat bounty after a vulnerability in its native Bitcoin Bridge was exploited on September 11.

The team disclosed the incident on its official X account, stating that only the Bitcoin Bridge was affected and that its other routes remain operational and safe. The disclosure adds to a string of bridge security incidents that have rattled the sector in recent weeks.

What Happened to the Bitcoin Bridge According to Symbiosis, an attacker exploited a vulnerability in the Bitcoin Bridge at approximately 04:28 UTC on September 11, 2026.

The breach enabled the minting of a synthetic bitcoin representation, syBTC, on BNB Chain, echoing the Polkadot bridge exploit in which an attacker minted one billion DOT on Ethereum.