CoW Swap, a decentralized trading interface, said on Tuesday it had temporarily halted its services after detecting a Domain Name System (DNS) hacking incident affecting its website, highlighting ongoing security risks at the front-end layer of DeFi platforms.
In a post on X, the team said the attack occurred at 2:54 p.m. UTC and warned users to avoid interacting with its interface until further notice. Although the protocol’s underlying infrastructure, including its backend and APIs, was not directly compromised, both were suspended “as a precautionary measure” while the team worked to resolve the issue.
DNS hijacking allows attackers to redirect users from a legitimate domain to a similar malicious site, often with the aim of emptying crypto wallets or harvesting private data. The attack vector has become a persistent weak point in decentralized finance, where users typically rely on web interfaces to access otherwise secure smart contracts.
CoW Swap operates as a decentralized exchange aggregator, searching multiple locations for liquidity and using a mechanism known as “coincidence of wants” to match trades directly between users or aggregate them for more efficient execution. Orders are processed by competing “solvers” that optimize trade outcomes, a design intended to reduce slippage and limit maximum extractable value (MEV) exposure.
MEV is a practice on blockchain in which bots rearrange transactions to profit at the expense of users, making mitigation essential to ensure fair prices and protect traders.
The platform is governed by CoW DAO, a decentralized autonomous organization from the Gnosis ecosystem. The project has positioned itself as a user protection alternative in DeFi trading, with a focus on execution quality and fairer trading results.
“We are now actively working to resolve the situation. Please continue to refrain from using swap dot cow dot fi until we confirm that it is safe to use,” the team wrote on X.
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