# Harmony Protocol Rolls Back Network Following Security Breach The network will revert to August 11 after 2.385 trillion tokens were illicitly minted. - **Source:** [Bitcoin News](https://brifing.si/source/d8aeaf1e-9839-4dad-9d25-7a6bf3fbeef8) - **Published:** 2026-08-18 - **Topic:** [Finance](https://brifing.si/c/finance) - **Original article:** - **On Brifing:** https://brifing.si/s/1debb711-4fdf-45c1-9b5c-edb854a8afa6 ## Security Breach and Token Inflation Harmony Protocol announced that 2.385 trillion ONE tokens were illicitly minted following a security breach on August 12. The attacker exploited verification vulnerabilities to manipulate tokens. This led to a sudden surge in token supply and a price drop of over 30%. Developers decided to roll back the network to August 11 to resolve the crisis. ## Technical Details of the Attack The attack exploited vulnerabilities in cross-shard validation and quorum code. The attacker attempted 534 fraudulent transfers within a 106-second window, with 477 of them succeeding. This resulted in the unauthorized minting of 2.385 trillion ONE tokens, which were quickly routed to crypto exchanges. ## Emergency Measures and Patch Harmony developers released an emergency patch, Mainnet v2026.1.1, to prevent further unauthorized token minting. Cross-chain bridge services were suspended, and crypto exchanges were urged to freeze wallet addresses linked to the exploit. ## Alternative Solutions and Decision The project team evaluated alternative solutions, including targeted token burns, blacklisting specific addresses, and selective transaction replay. However, due to the risks of damaging unrelated funds or creating permanent chain inconsistencies, they opted for a network rollback. ## Technical Details of the Rollback According to the rollback plan, specific block heights on Shard 0 and Shard 1 will be reverted. This will permanently discard 141,628 blocks created after August 11 at 23:25:37 UTC. These blocks include 109,126 user transactions and 315 staking transactions. ## Legal and Security Collaboration Harmony’s team collaborated with an independent security firm to trace 99.9% of the forged tokens. Law enforcement, bridge providers, and exchanges are coordinating recovery efforts to address the breach. ## Impact on Token Prices The unauthorized token minting caused the price of ONE to drop by over 30%, marking a historic low. The rapid transfer of tokens to exchanges severely disrupted market stability. The impact of the rollback on prices is eagerly anticipated. ## Future Preventive Measures Harmony Protocol plans to strengthen security protocols to prevent similar attacks in the future. This incident highlights the severity of security vulnerabilities in the blockchain ecosystem. The project is adopting a transparent communication strategy to regain user trust. ## Sources covering this story - https://news.bitcoin.com/blockchain/harmony-protocol-to-roll-back-network-after-massive-exploit/ — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._