Svmuu reported that Syscoin posted on X, stating that a recent security incident occurred on the Syscoin cross-chain bridge, involving approximately 5 billion SYS. The attacker exploited a verification issue in the cross-chain bridge process, resulting in the creation of unauthorized SYS outputs on the UTXO side.
The cross-chain bridge has been temporarily suspended. Syscoin has contacted exchanges and relevant partners, requesting blacklisting, freezing, or close monitoring of SYS deposits associated with the compromised UTXO path and subsequent spending. The team has identified the affected verification path and developed a fix. The current priority is to complete the implementation and review of the fix, and to determine the correct process for reversing the unauthorized SYS outputs and eliminating their impact on the network. Users are advised not to interact with the cross-chain bridge during its suspension.