ChainCatcher report: The cross-chain liquidity protocol Symbiosis has announced a security incident. At approximately 04:28 UTC on September 11, 2026, an attacker exploited a vulnerability in the Bitcoin bridge, resulting in the suspension of BTC routing, while all other routes continue to operate normally. The team confirmed that only the Bitcoin bridge was affected and has been isolated from other systems; all other routes—including EVM chains, TRON, TON—and components such as Octopools remain unaffected. The team has recovered approximately 15 BTC and secured them in a multisig wallet under their control. Symbiosis has offered a bug bounty of 20% of the stolen funds to the attacker, valid until September 13, 2026; after this date, the same percentage will be offered to any party providing information that assists in recovering the funds. The final loss assessment is still underway, and confirmed figures will be disclosed later. The team is individually contacting affected liquidity providers and developing a compensation framework. The relayer group remains operational and continues to ensure network security.
Symbiosis Bitcoin Bridge Hacked, BTC Routing Suspended
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Summary
Today’s BTC news: On September 11, 2026, UTC, the cross-chain protocol Symbiosis reported a security breach. Attackers exploited a vulnerability in the Bitcoin bridge, leading to a pause in BTC routing; all other routes remain operational. The team recovered approximately 15 BTC and secured it in a multi-signature wallet. A 20% white-hat bounty is available until September 13, 2026, for the attacker or anyone providing information leading to recovery. Final loss estimates are still being calculated, and affected liquidity providers are being contacted regarding compensation.
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