Symbiosis Protocol Suspends Bitcoin Swaps Following Security Update

The cross-chain liquidity protocol Symbiosis has officially announced the temporary suspension of all Bitcoin-related exchange functions as the technical team works on deploying a critical update. This development follows reports of a security incident involving the minting of unauthorized assets. While Bitcoin-linked operations are offline, the protocol representatives confirmed that other cross-chain exchanges and core operations remain fully functional for users.

Exploitation on BNB Smart Chain and Market Impact

The suspension follows an alert from Web3 security firm Blockaid, which monitored an exploit targeting the protocol on the BNB Smart Chain (BSC). According to security researchers, an attacker manipulated the BridgeV2 receive operations by utilizing signed messages to mint an astronomical amount of syBTC—approximately 2^62 raw units—to a newly created address.

The impact of the breach extended beyond the BSC network as the attacker moved to liquidate the illicitly obtained assets. The following actions were recorded by on-chain analysts:

• The beneficiary address transferred funds to the Ethereum network.
• The attacker sold approximately 4.39 Wrapped Bitcoin (WBTC) via Uniswap V4.
• The total amount cashed out from this specific transaction is estimated at $274,000.

Protocol Response and Technical Measures

In response to the detected vulnerability, the Symbiosis team initiated a maintenance window to prevent further unauthorized minting and to safeguard the liquidity pools. The team is currently focused on patching the BridgeV2 logic to ensure that signed operations cannot be spoofed or replayed by malicious actors.

Symbiosis Bitcoin-related exchange functions are currently temporarily unavailable, and the team is deploying an update. Other exchanges and protocol operations can still be used normally. Subsequent progress will be announced through official channels.

The incident highlights ongoing challenges in cross-chain interoperability, particularly regarding the verification of bridge messages across different virtual machine environments. As of September 11, 2026, the protocol has not provided a specific timeline for the restoration of Bitcoin swaps, advising users to monitor official social media accounts for the completion of the security deployment.