Harmony ONE Token Crashes After Attacker Mints 4 Billion Tokens
An attacker minted approximately 4 billion ONE tokens, equivalent to roughly one-quarter of Harmony's total supply, causing the token to fall between 26% and 37% depending on the exchange. Harmony is coordinating with exchanges to freeze funds and evaluating a network rollback to undo the exploit.
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The Attack and Token Minting
Harmony discovered that an attacker successfully minted approximately 4 billion ONE tokens, representing about one-quarter of the network's circulating supply. The exact mechanism by which the attacker gained the ability to mint tokens without authorization has not been publicly disclosed. The exploit occurred during Asian market hours on Tuesday.
Price Decline and Exchange Response
ONE fell sharply following the discovery, though sources report different magnitudes: CoinDesk reported a 26% decline while Decrypt cited a 37% drop, likely reflecting different timeframes and exchange-specific pricing. Harmony said it is working with major exchanges to freeze accounts holding the illegitimately minted tokens in order to prevent their sale or transfer.
Proposed Remedies
Harmony is preparing a software fix to prevent further unauthorized minting and is also weighing a network rollback as a potential solution. A rollback would undo not only the attack but also every legitimate transaction recorded on the chain since the exploit occurred, a step that would be contentious and carry significant operational risk. The team has not announced a final decision on whether to proceed with the rollback or pursue other remediation strategies.
Why It Matters
For Traders
ONE volatility will remain elevated until Harmony clarifies its remediation plan; a rollback would invalidate recent trades and alter on-chain history.
For Investors
The exploit and potential rollback raise questions about Harmony's validator security and governance; holders face dilution from the minted supply regardless of remediation approach.
For Builders
Any rollback would force dApps and infrastructure on Harmony to reconcile state changes; validators must await protocol guidance on finality and chain history.
This article is for information only and is not financial advice. Read the full disclaimer.
