Harmony’s native token fell sharply after an exploit allegedly minted 4 billion new tokens, prompting the team to issue a patch and freeze affected funds.
Harmony’s native token, ONE, plunged more than 40% on Friday after a security breach allegedly allowed an attacker to mint roughly 4 billion new tokens, flooding the market and sparking panic among investors.
What happened on the Harmony network
According to the Harmony team, the exploit targeted a smart‑contract function that failed to enforce proper minting limits. The flaw was triggered by a specially crafted transaction that generated a massive token supply increase, prompting the network to temporarily halt new blocks while developers investigated.
The incident was first reported on social media by community members who noticed an abnormal spike in token balances across several wallets. Within minutes, the price of ONE began sliding, erasing billions of dollars in market value.
Immediate response and mitigation
Harmony’s core developers quickly released a patch that closed the vulnerable function and froze the newly minted tokens. The freeze prevents the attacker from moving the illicitly created supply, though the tokens remain locked on the blockchain.
In a statement posted on the official Discord channel, the team emphasized that the patch does not affect legitimate token holders and that a full audit of the contract code is underway to prevent future incidents.
Impact on the market and community
The price drop wiped out roughly $2 billion in market capitalization, according to on‑chain analytics platforms. Traders responded by liquidating positions, and several exchanges temporarily suspended ONE trading pairs to curb volatility.
Community sentiment turned sharply negative, with many users demanding compensation for losses. Harmony has pledged to review its bug‑bounty program and consider reimbursing affected users if the investigation confirms malicious intent.
- Patch deployed to close minting loophole
- Frozen 4 billion newly minted tokens
- Ongoing audit of smart‑contract code
- Potential compensation plan under review
While the incident raises concerns about the robustness of Harmony’s smart‑contract infrastructure, the rapid response demonstrates the team’s capacity to act under pressure. Observers note that such exploits are not uncommon in the broader DeFi ecosystem, underscoring the need for rigorous code reviews.
“We take the security of our network seriously and are committed to protecting our users.” – Harmony development team
The episode serves as a reminder that even established blockchain platforms remain vulnerable to sophisticated attacks, and that investors should stay vigilant.
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