A devastating $292 million exploit has sent shockwaves through the cryptocurrency industry, exposing weaknesses in DeFi infrastructure and sparking fears of a ripple effect across lending protocols. The attack, which occurred over the weekend, targeted Kelp's rsETH token and the mechanism used to transfer assets between blockchains.
According to early analysis, the attacker manipulated the system to create large amounts of unbacked tokens, which were then used as collateral to borrow and drain real assets from lending markets, primarily from Aave, the largest decentralized crypto lender. This incident is the latest blow to DeFi, coming just weeks after the $285 million exploit of Solana-based protocol Drift, further eroding investor trust in the nearly $90 billion crypto sector.
The attack worked by targeting a LayerZero bridge component, a critical piece of infrastructure that enables assets to move across different blockchains. Bridges typically function by locking assets on one chain and minting equivalent tokens on another, relying on a trusted entity to confirm deposits. In this case, Kelp acted as the verifier, but the system relied on a single-signer setup, allowing just one entity to approve transactions.
The attacker exploited this weakness, signing a message that enabled them to mint large amounts of rsETH. The tokens were then quickly deployed, with the attacker immediately depositing them in lending protocols, mostly Aave, to borrow real ETH against.
This maneuver transformed the exploit into a broader market issue, leaving DeFi lending platforms with collateral that may be difficult to unwind, while valuable and liquid assets are already drained. As a result, Aave and other lending protocols may be sitting on hundreds of millions of dollars in questionable collateral and bad debt, raising concerns of a potential 'bank run' dynamic as users rush to withdraw funds. Aave saw a significant drop in assets on the protocol, with users withdrawing their assets following the incident. The token associated with the protocol was down around 15% over the past 24 hours' trading.
Key questions remain around how the validator was compromised, with uncertainty over whether it was hacked, misconfigured, or misled. The attacker's identity is also unknown, although the scale of the attack suggests a sophisticated actor. The exploit serves as another reminder that as DeFi grows more interconnected, failures in one layer can quickly cascade across the system. The incident has also highlighted shortcomings in how new assets are onboarded to lending platforms, with configurations like Kelp's 1-of-1 verifier setup having been flagged as a potential risk.
However, some experts believe that DeFi will learn from this incident and become stronger than before. Despite this, incidents like this erode investor confidence in the broader DeFi sector, with 2026 shaping up to be the worst year for DeFi hacks.