Following a security breach on Aug. 12 where an attacker exploited verification vulnerabilities to illicitly mint 2.385 trillion tokens, Harmony Protocol is executing a full network rollback to Aug. 11.
Key Takeaways
Harmony Protocol suffers exploit resulting in 2.385 trillion unauthorized ONE tokens minted on Aug. 12.ONE token price tumbled over 30% following the massive surge in unauthorized token supply.Developers, security teams, and law enforcement align to execute a blockchain rollback to Aug. 11.The massive, unexpected surge in token supply triggered an immediate crash in the price of ONE, which dropped by more than 30% as billions of forged tokens were quickly routed to cryptocurrency exchanges.
In Monday’s announcement, the project team stated it had evaluated alternative remedies—including targeted token burns, blacklisting specific address clusters, selective transaction replaying, and token migration—before concluding that a fixed-window rollback was the only solution that would not risk damaging unrelated funds or causing permanent chain state inconsistencies.

















