Harmony ONE Plummets 26% Amid Mint Attack and Market Turmoil

Harmony's network suffered a 26% price plunge after a morning‑hour attack that allegedly minted tokens equal to 25% of the total supply, sending shockwaves through the crypto market.

The Mechanics Behind the Mint Attack

■Threat actors tampered with the protocol's UTXO set to create counterfeit tokens.

■The forged tokens amount to roughly 300 million ONE, out of the existing 1.2 billion ONE supply.

■Harmony's monitoring team flagged the anomaly by tracking the chain's state root in real time.

Market Reaction and Liquidity Shock

■The ONE/USDT pair slumped 26%, shrinking 24‑hour volume from $45 million to $28 million.

■Major exchanges Binance, KuCoin, and OKX moved to freeze the affected funds immediately.

■Liquidity providers trimmed short‑term staking rewards by 15% to mitigate exposure.

Harmony's Emergency Countermeasures

■Developers accelerated a hard fork to isolate the attack and burn the counterfeit tokens, targeting a v2.3.7 release on testnet within 48 hours.

■Coordinated with exchanges, ~90% of the compromised assets have been locked down.

■A software patch will be rolled out across all nodes to harden the UTXO validation logic.

Cem Talu: Protocol‑level exploits underscore the paramount importance of on‑chain security. Harmony's swift response and exchange coordination have curbed immediate panic selling, yet investor confidence will remain fragile until the network proves its resilience. For UTXO‑based chains, tighter formal verification and multi‑sig governance layers are essential to deter similar exploits. Crypto fund managers should recalibrate margin risk and closely monitor ETF inflows in the aftermath of such events.