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Polkadot

www.coingecko.com • April 13, 2026

According to CertiK, there's an exploit on the Hyperbridge gateway contract on Ethereum.

The attacker forged a cross-chain message, gained unauthorized admin rights over the bridged Polkadot (DOT) token contract, and minted approximately 1 billion tokens.

For full details and on-chain transaction, please refer to the post here .

The full story

This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Polkadot Hyperbridge Exploit: 1 Billion DOT Minted and Sold On April 13, 2026, a vulnerability in the Hyperbridge gateway contract on Ethereum allowed an attacker to mint 1 billion unauthorized Polkadot (DOT) tokens. The exploit was facilitated by forging messages to gain administrative control over the bridged DOT token contract. The attacker subsequently sold the minted tokens for approximately $237,000 worth of Ether. This incident specifically affected DOT tokens bridged to Ethereum, while the native DOT and Polkadot ecosystem remained secure. The Hyperbridge protocol has been paused for investigation and remediation. The exploit highlights ongoing vulnerabilities in cross-chain interoperability solutions. The incident has raised concerns about the security of decentralized finance (DeFi) infrastructures. Security firms CertiK and BlockSec are investigating the attack vector and its implications. 19 sources 66

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Ethereum Polkadot