PeckShield: Cross-Chain Bridge Attacks Drove $329M in Crypto Losses From February to May 2026

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Blockchain security firm PeckShield has attributed $329 million in cryptocurrency losses to cross-chain bridge attacks over a four-month window from February to May 2026, highlighting persistent vulnerabilities in the infrastructure that connects separate blockchain networks.

PeckShield Reports $329 Million in Bridge Attack Losses From February to May 2026

The $329 million figure covers losses tied specifically to exploits targeting cross-chain bridges between February and May 2026. PeckShield, which tracks crypto security incidents and on-chain exploit data, positioned bridge attacks as the dominant category of losses during that period.

The timeframe aligns with several documented bridge incidents. IoTeX disclosed an exploit of its IoTube bridge and published a recovery roadmap detailing the security incident and planned remediation steps. Opulous also published a hack report covering a separate incident during the same window.

Earlier data from PeckShield showed that February 2026 crypto hack losses were the lowest since March 2025, suggesting that the bulk of the damage accumulated in the months that followed.

Why Cross-Chain Bridges Remain a Prime Target

Cross-chain bridges allow users to move tokens between separate blockchain networks. They work by locking assets on one chain and issuing equivalent tokens on another, which means bridges often hold large pools of concentrated liquidity in their smart contracts.

That concentrated liquidity makes bridges high-value targets. A single successful exploit can drain assets worth tens or hundreds of millions of dollars in one transaction, far exceeding what an attacker might extract from a typical DeFi lending protocol or decentralized exchange.

Bridge architectures also introduce multiple potential attack surfaces. They rely on combinations of smart contracts, validator sets, relayer networks, and cross-chain messaging layers. A weakness in any one component can compromise the entire system, and because bridges span multiple chains, a single breach can affect users across more than one blockchain ecosystem.

The decision by some projects to reduce cross-chain bridge support reflects growing awareness of the security burden that maintaining bridge infrastructure across many networks creates.

What the February to May 2026 Losses Signal for DeFi Security

A $329 million loss total over four months points to sustained, not isolated, bridge risk. Unlike a single large exploit that can be attributed to one protocol’s mistake, repeated bridge attacks across multiple projects suggest structural weaknesses in how bridges are designed, audited, and monitored industry-wide.

Bridge incidents carry consequences beyond the directly affected protocols. When a bridge is compromised, wrapped tokens on the destination chain can lose their backing, creating ripple effects for any DeFi protocol that accepted those tokens as collateral. This dynamic links bridge security directly to broader DeFi stability.

Trust in interoperability infrastructure is essential for multi-chain DeFi to function. Repeated bridge losses can push users and liquidity providers toward staying on single chains rather than bridging assets, which fragments liquidity and slows ecosystem growth. Projects focused on governance and protocol resilience may benefit from demonstrating stronger security frameworks in this environment.

Security Takeaways for Crypto Projects and Users

For users, basic due diligence before bridging assets includes checking whether the bridge has undergone recent third-party security audits, whether the project maintains a bug bounty program, and how quickly the team has responded to past incidents. IoTeX’s published recovery roadmap after its IoTube exploit offers one example of transparent incident response.

For projects operating bridges, the pattern of losses reinforces the importance of real-time monitoring systems that can detect and pause suspicious transactions before funds leave the protocol. Key management practices, multisig configurations, and upgrade mechanisms all represent areas where a single oversight can become a critical vulnerability.

Security disclosures and post-incident transparency matter. Protocols that publish detailed hack reports, as both IoTeX and Opulous did during this period, give the wider ecosystem data to learn from. Projects that stay silent after incidents leave other teams to rediscover the same vulnerabilities independently.

The scale of losses also raises questions about whether institutional capital flows into crypto will face additional scrutiny as bridge security concerns persist in DeFi infrastructure.

FAQ About Cross-Chain Bridge Attacks and Crypto Losses

What is a cross-chain bridge attack?

A cross-chain bridge attack is an exploit that targets the infrastructure connecting two or more blockchain networks. Attackers typically exploit vulnerabilities in the bridge’s smart contracts, validator logic, or messaging layer to drain locked assets.

Why are crypto bridges frequently hacked?

Bridges hold large pools of locked assets and rely on complex multi-chain architectures with multiple potential failure points. The combination of high-value targets and broad attack surfaces makes them attractive to sophisticated attackers.

Why does PeckShield’s $329 million figure matter?

The figure quantifies the cumulative damage from bridge exploits over a defined four-month period, providing a concrete measure of how costly bridge vulnerabilities remain for the crypto industry in 2026.

Are bridge attacks a major risk for DeFi in 2026?

The February to May 2026 data suggests bridge attacks remain one of the most significant sources of DeFi losses. Until bridge architectures improve their security models, users who move assets across chains face elevated risk compared to single-chain activity.

Disclaimer: This article is for informational purposes only and does not constitute financial or investment advice. Cryptocurrency and digital asset markets carry significant risk. Always do your own research before making decisions.