Harmony has acknowledged a potential exploit after its official account shared a post from X user Juiceberg. The post, which was based on on-chain data, said the Harmony protocol was hit by a vulnerability exploit in which the attacker illegally minted approximately 4 billion ONE tokens through empty blocks. That amount is equal to roughly 26% of the token's total supply. The same on-chain data showed that about 2.8 billion of those tokens were quickly moved to exchanges during a period of sharp price decline. In addition, Harmony's totalSupply endpoint failed to reflect the additional token issuance, meaning the actual supply recorded on the blockchain did not match the supply figures visible in public data. In a reply, Harmony said it is working with its team and relevant exchanges to block and freeze the funds. The protocol has also said it is researching a patch and a possible rollback plan.
Harmony has acknowledged a likely exploit on its network after sharing a post from X user Juiceberg, whose on-chain data showed that roughly 4 billion ONE tokens were minted illegitimately through empty blocks. That figure equals about 26% of the token's total supply.
The data also indicated that nearly 2.8 billion of those tokens were quickly moved to exchanges during a sharp price decline. At the same time, Harmony's totalSupply endpoint did not reflect the extra issuance, leaving a gap between the actual on-chain supply and publicly reported numbers.
In a reply, Harmony said it is working with its team and relevant exchanges to block and freeze the funds. The protocol is also looking into a patch and a potential rollback.
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