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CryptoHigh ImpactUpdated×7•Originally published 13 April 2026•Updated 14 April 2026•

1 min read

Polkadot Network Hit by Major Exploit; 1 Billion Unauthorized DOT Tokens Minted

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Key Facts

1Polkadot (DOT) was reportedly hit by an exploit allowing an attacker to mint 1 billion unauthorized DOT tokens.

about 2 months ago

Version History

8 additional sources confirmed this story

Version 7about 2 months ago

What changed: Added technical details regarding message forgery for contract control, specified the attack date as April 13, 2026, and clarified how thin liquidity limited the attacker's realized gains.

Version 6about 2 months ago

What changed: Clarified that the exploit was in a third-party bridge rather than Polkadot's core, updated the realized loss to $237k, and updated the weekend price drop to 10%.

Version 5about 2 months ago

What changed: Added qualitative assessment of the vulnerability as a basic issuance control weakness and noted the shift to meme coin-like market dynamics.

Version 4about 2 months ago

What changed: The scale of unauthorized minting was corrected from 1 million to 1 billion DOT tokens, and the flaw was identified in the Hyperbridge smart contract.

Version 3about 2 months ago

What changed: Updated to include exchange suspensions (e.g., Upbit), specific details on the attacker's swap to 108.2 ETH, and the total collapse of the bridged token's price.

Version 2about 2 months ago

What changed: Added specific details from Arkham regarding the use of fake bridged tokens and the confirmed drain of $240,000 in ETH liquidity.

Version 1about 2 months ago

What changed: Updated the number of minted tokens from 1 billion to 1 million, identified the Polkadot Bridge as the attack vector, and recorded a 7% price drop.

New technical details have emerged regarding the Polkadot (DOT) security breach on April 13, 2026, revealing that the exploit was executed by forging a message to seize administrative control of the token contract on the Ethereum network. The attacker targeted the message verification process within the Hyperbridge cross-chain system to unauthorizedly mint 1 billion DOT tokens. This incident triggered an immediate 7% flash-crash in the token's price within minutes, contributing to a total 10% decline over the weekend. Despite the massive scale of the minting, the attacker's realized gains were limited to approximately $237,000 due to insufficient liquidity in trading pools to cash out the fabricated assets. Developers are currently focused on patching the bridge infrastructure to restore security and market confidence.