A security breach involving Hyperbridge, a cross-chain bridge that facilitates transfers of the DOT token from Polkadot to Ethereum, sent shockwaves through the market on Monday April 13.
On-chain data and early reports showed that the attacker exploited a vulnerability in Hyperbridge’s Ethereum gateway contract.
The exploit involved the creation of a cross-chain message via the Interoperable State Machine Protocol (ISMP), allowing the attacker to bypass the state check in the smart contract. This breach ultimately granted unauthorized administrative control over the DOT token contract bridged to Ethereum (ETH).
Once control was established, the attacker created approximately 1 billion bridged DOT tokens and quickly unloaded a portion of them, extracting approximately $237,000 worth of ETH using available liquidity.
However, the low liquidity of the Ethereum DOT pool significantly limited the attacker’s gains.
Notably, the exploit remained contained within the ERC-20 representation of the DOT.
Polkadot (DOT) confirmed that other bridges in its parachain ecosystem were unaffected, while native DOT tokens remained secure.
This incident once again highlights a broader concern, as cross-chain bridges often hold administrative control over token contracts on destination chains.
In response, Hyperbridge has suspended all transactions on its network as investigations into the breach continue. The incident adds to a growing list of high-profile exploits. Earlier, on April 1, 2026, the Drift protocol on Solana suffered a much larger breach, with approximately $285 million worth of USDC reportedly drained.
It also remains to be determined whether similar vulnerabilities exist on other bridged assets using the same gateway contract.
DOT remains stable, but downside risks remain
DOT fell 3.56% after the announcement and is trading at $1.18, just above its all-time low of $1.13 recorded on February 13, 2026, according to CoinMarketCap.
Polkadot struggled throughout the year, becoming one of the worst performing stocks on the market. The altcoin is down 50.47% year-to-date and remains about 74% below levels seen before the October 10 sell-off that intensified the broader market downturn.
Spot market flows reflected a muted reaction, with a net outflow of just $43,170 following the news. In contrast, derivatives data suggests traders are gradually increasing their bullish exposure, with high trading volume in the perpetual market indicating speculative positioning.
For now, the price action remains relatively stable.
However, downside risks persist. Weak sentiment, reduced capital, and sustained pressure in the broader crypto market continue to leave DOT vulnerable to a possible move to a new all-time low.
