Cryptocurrency hacks reached unprecedented levels during the first half of 2026, with total losses surpassing $1 billion according to security firm Blockaid. The figure represents a record high for the industry during the six-month period, highlighting persistent vulnerabilities across blockchain networks despite ongoing security advancements and monitoring efforts.
Ethereum and Solana emerged as the most targeted networks during this period, bearing the brunt of the financial impact. Projects built on Ethereum suffered losses totaling $332 million, while Solana-based protocols saw $326 million drained through various exploit vectors, according to data published by The Block.
The distribution of losses marks a notable shift in the threat landscape compared to previous reporting periods. While Ethereum maintained its position as the hardest-hit blockchain, Solana ascended to become the network with the second-highest losses, displacing Arbitrum from that position, Cointelegraph reported. The change indicates evolving attacker preferences and potentially increased activity levels on the Solana network that attracted malicious actors seeking high-value targets.
Blockaid attributed the substantial damage across both ecosystems primarily to key compromises, a vector that continued to dominate as the primary attack method during the first six months of the year. These incidents typically involve the compromise of private keys or administrative credentials, granting attackers direct access to protocol treasuries or smart contract controls without needing to exploit code vulnerabilities directly.
The nearly equivalent losses between Ethereum and Solana—separated by only $6 million—suggest that attackers have expanded their focus beyond the largest smart contract platform to include high-throughput alternatives. Solana's $326 million in losses represents a significant concentration of risk on the network, coming close to matching Ethereum's $332 million despite differences in total value locked, protocol maturity, and historical attack patterns.
The disparity between the two networks narrowed significantly compared to historical data, with Solana's total approaching parity with Ethereum's figures. This convergence suggests that while Ethereum remains the primary target in absolute terms, Solana has become increasingly attractive to exploiters, potentially reflecting the network's growing total value locked and user activity during the first half of the year.
Security researchers have noted that the $1 billion milestone underscores the escalating sophistication and persistence of threat actors in the digital asset space. The figure encompasses various incident types across decentralized finance protocols, bridges, and other on-chain applications, though the specific breakdown by attack vector beyond key compromises was not detailed in the available reports.
The data from Blockaid serves as a benchmark for measuring the effectiveness of security measures implemented across the cryptocurrency ecosystem. With Ethereum and Solana collectively accounting for $658 million of the total $1 billion in losses, the two networks represented the majority of funds stolen during the period, emphasizing the concentration of risk on major Layer-1 platforms even as the industry diversifies across multiple blockchain environments.