A billion fake DOT tokens were minted in minutes — and exposed the weakest link in cross-chain promises
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Attackers dumped 1 billion counterfeit DOT tokens into shallow Ethereum DEX pools, extracting $237,000 before the price collapsed under its own weight. The tokens were not real. They were conjured from a vulnerability in the Hyperbridge gateway, which connects Polkadot’s ecosystem to Ethereum. By forging cross-chain messages, hackers seized administrative control of the DOT ERC-20 contract on Ethereum and triggered an infinite mint. The entire sequence — from message spoofing to minting to dumping — unfolded in minutes.
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The fake supply flooded liquidity pools too thin to absorb the sell pressure. On-chain data shows a vertical spike in volume and price, followed by a near-total wipeout. The attackers profited not from scale, but from speed and structural fragility. The real DOT token on Polkadot’s relay chain was untouched. No native supply was inflated. No consensus was broken.
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Yet exchanges reacted. Upbit and Bithumb suspended DOT deposits and withdrawals, citing confusion risk from the fake token. The pause did not stem a market crash — real DOT held steady — but it revealed how reputational contagion can outpace technical damage.
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crypto security A billion counterfeit DOT tokens generated only $237,000 in profit — not because the hack failed, but because the market refused to pay
The attackers walked away with just $237,000 — not because they failed, but because no one was willing to pay more for the stolen tokens. Hackers exploited a vulnerability in the Hyperbridge gateway to forge cross-chain messages on Ethereum, allowing them to alter administrator settings of a Polkadot-linked DOT token contract deployed on the Ethereum mainnet. With control of the contract, they minted 1 billion counterfeit DOT tokens. They immediately dumped them on decentralized exchanges. But the liquidity pool for this specific DOT representation was so shallow that each sale collapsed the price. The market absorbed the tokens only at a steep discount. As a result, the attackers’ haul amounted to a fraction of what the headline minting figure suggested was possible. Upbit and Bithumb responded by suspending DOT deposits and withdrawals, moving to isolate any potential contagion. The real story isn’t the breach — it’s the market’s silent intervention. The infrastructure failed. The economics contained the damage.
The breach did not compromise Polkadot’s shared security model. It compromised its bridge. Hyperbridge’s Ethereum-side contract failed to properly validate incoming messages, allowing forged instructions to escalate into admin privileges. That single flaw turned a trusted gateway into a printing press for nothing.
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This was not a billion-dollar heist. It was a $237,000 exploit that could have looked like much more. The shallow liquidity that limited losses also proved how easily perception can be weaponized. The attack mirrors past bridge failures where verification logic buckled under crafted inputs. Once again, the weakest link isn’t the chain — it’s what connects them.
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