Written by Yohan Yunstaff editorReviewed by Robert Lakinstaff editor

Written by Yohan Yunstaff editor

Reviewed by Robert Lakinstaff editor

Harmony plans rollback, wiping 109,000 transactions after ONE exploit

Latest NewsPublishedAug 17, 2026

Harmony stated selectively restoring transactions could create inconsistent chain state, as Ravencoin faces a separate rollback dispute after an exploit.

Harmony plans to roll back its blockchain to Aug. 11 following an exploit that created forged ONE tokens, discarding more than 109,000 transactions verified after its chosen checkpoint.

The layer-1 network stated Monday that validators would revert to blocks recorded at 11:25 pm UTC on Aug. 11. New blocks will be produced from the next heights using replacement databases.

The discarded window includes 109,126 regular transactions and 315 staking transactions. Harmony stated selectively restoring transactions was unsafe because balances, contract states, nonces and other conditions would differ on the replacement chain.

Harmony was considering a rollback last week after reports that unauthorized ONE had been minted and sent to exchanges.

It stated Monday that investigators had traced nearly all of the forged ONE to wallets or service boundaries and were working with exchanges, bridges and law enforcement. At last look, the token had a market cap of roughly $10.8 million, as reported by Coingecko data.

Harmony’s plan puts it alongside Ravencoin among networks seeking to reverse already verified blockchain activity after an exploit.

Ravencoin faced a potential three-day blockchain reorganization after a consensus flaw was exploited. Mining pools controlling most of Ravencoin’s hash rate began building a competing chain that could reverse previously verified transactions.

Ravencoin recent price of $0.002819 showed a market cap of $46.3 million.

Related: Ethereum devs to narrow 66 proposals tied to Hegotá upgrade

Cointelegraph is committed to independent, transparent journalism. This news article is produced in accordance with Cointelegraph’s Editorial Policy and aims to provide accurate and timely information. Readers are encouraged to verify information independently.

• Harmony
• DeFi
• Hacks
• Hackers
• Cryptocurrencies
• Cybercrime
• Cryptocurrency Exchange
• Blockchain

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