Syscoin (SYS) has temporarily suspended its cross-chain bridge operations following the discovery of an unauthorized minting event that created approximately 5 billion SYS tokens. The project disclosed the incident on social media, stating that a hacker exploited a verification flaw within the bridge to mint the tokens on the UTXO chain without authorization.
Details of the Exploit
According to Syscoin’s official statement, the attacker leveraged a vulnerability in the bridge’s verification process to generate the massive token supply. The unauthorized minting occurred on the UTXO chain, a foundational layer of Syscoin’s architecture. Following the exploit, the funds were distributed across multiple addresses, complicating recovery efforts.
The project is currently conducting a forensic investigation to determine the root cause and the full extent of the breach. Syscoin has also reached out to exchanges and key partners to block deposits and trading of the affected assets, aiming to prevent the illicit tokens from entering broader circulation.
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