The team behind Hyperbridge, a protocol connecting Polkadot and Ethereum blockchains, has revised its estimate of losses from a recent hack to approximately $2.5 million—ten times higher than initially reported. The breach, which occurred earlier this week, underscores growing vulnerabilities in cross-chain infrastructure as decentralized finance (DeFi) expands.
Analysts note that bridge protocols, which facilitate asset transfers between blockchains, have become prime targets for exploits due to their complex smart contract architectures. “This isn’t an isolated incident,” said a blockchain security researcher who requested anonymity. “Bridges account for over 70% of major crypto hacks in 2026.”
Hyperbridge’s delayed disclosure follows a pattern observed in past crypto breaches, where projects often downplay initial loss estimates. The protocol’s developers attributed the discrepancy to “ongoing forensic analysis” but provided no technical details about the exploit.
Regulators are increasingly scrutinizing cross-chain projects. A European Central Bank spokesperson told reporters: “These incidents validate our call for stricter oversight of interoperability solutions.” Meanwhile, Polkadot’s treasury has reportedly allocated emergency funds to assist affected users.
The hack could accelerate adoption of zero-knowledge proof-based bridges, which several Tier 1 projects are developing. However, migration may take years, leaving existing protocols vulnerable. “The arms race between hackers and bridge developers just escalated,” noted a CoinShares analyst.