TechFlow reports that on June 8, Syscoin released a preliminary post-mortem of the cross-chain bridge incident, stating that due to a verification flaw in the bridging process, the attacker exploited an anomaly in transaction proof validation to illegitimately mint approximately 5 billion SYS tokens on the UTXO side via the affected bridging path.
The Syscoin cross-chain bridge has been suspended. The team is currently investigating the incident, implementing fixes, and coordinating the handling of the anomalous SYS outputs. After entering the UTXO chain, the related funds were transferred and split—approximately 4 billion SYS and 1 billion SYS were sent to two primary addresses, respectively.
Syscoin stated that it has contacted exchanges and ecosystem partners to freeze, blacklist, or closely monitor the tainted funds and their subsequent transactions.
