Garden Finance Solver Exploit Exposes Cross-Chain Vulnerabilities as October Hack Losses Drop 85%

The cryptocurrency security landscape witnessed a paradox in October 2025. While total hack losses plummeted 85.7% to just $18.18 million — the lowest monthly figure of the year — the incidents that did occur revealed sophisticated attack vectors targeting cross-chain infrastructure. With Bitcoin trading at $110,064 and Ethereum at $3,874 on November 1, the stakes for securing decentralized protocols have never been higher.

The Exploit Mechanics

The largest breach of October 2025 targeted Garden Finance, a cross-chain intent-based decentralized exchange. On October 30, an attacker compromised a single solver within the protocol’s network, draining approximately $11 million across multiple chains. The attacker exploited access control vulnerabilities in the solver’s execution layer, allowing them to redirect funds during the cross-chain settlement process.

According to data from blockchain security firm PeckShield, the Garden Finance incident accounted for nearly 60% of all October losses. The exploit followed a familiar pattern: the attacker identified a weak point in the solver infrastructure — the entity responsible for fulfilling user intent across chains — and manipulated the settlement logic to drain liquidity pools before the protocol could respond.

Affected Systems

Three specific incidents accounted for nearly 90% of October’s $18.18 million in total losses. Beyond Garden Finance, Typus Finance suffered a $3.4 million exploit stemming from access control issues within the project’s custom price oracle. Attackers manipulated the oracle to extract funds from lending pools that relied on the compromised price feed.

The third major incident involved Abracadabra.Money’s MIM_Spell contract, where $1.8 million was drained through a vulnerability in the protocol’s spell mechanism. These three incidents collectively demonstrated that even in a low-loss month, DeFi protocols remain vulnerable to access control failures and oracle manipulation — two attack categories that have persisted throughout 2025.

The Mitigation Strategy

The dramatic 85.7% drop from September’s $127.06 million in losses does not necessarily indicate improved security practices. Industry analysts note that the lower figure reflects the absence of large-scale exchange breaches rather than fundamental improvements in protocol security. North Korean hacking syndicates, responsible for over $2.83 billion in cumulative crypto theft, continue to evolve their attack strategies with a 50% increase in activity compared to the previous year.

Protocols are responding with enhanced solver audit requirements, multi-signature validation for cross-chain operations, and real-time monitoring systems that can flag anomalous settlement patterns. The shift toward intent-based architecture — where solvers compete to fulfill user trades — introduces new attack surfaces that require dedicated security tooling.

Lessons Learned

The October data from PeckShield reveals several critical takeaways for DeFi participants. First, access control remains the primary attack vector — all three major October exploits stemmed from inadequate permission management. Second, cross-chain protocols face unique risks because a single compromised solver can affect liquidity across multiple networks simultaneously. Third, the concentration of losses in just three incidents suggests that diversified risk across many smaller protocols may be more resilient than relying on a few large platforms.

For users holding assets in DeFi protocols, the October landscape reinforces the importance of understanding which components — oracles, solvers, governance mechanisms — underpin the platforms they use. A protocol’s security is only as strong as its most critical dependency.

User Action Required

Investors should review their DeFi exposure to intent-based DEXs and cross-chain bridges, particularly those relying on single-solver architectures. Verify that protocols have undergone recent security audits covering solver infrastructure and oracle implementations. Consider diversifying across multiple protocols to limit exposure to any single point of failure. With the crypto market capitalization continuing to grow — Bitcoin alone holding a market cap above $2.19 trillion — the incentive for attackers will only increase, making proactive security awareness essential for every participant.

Disclaimer: This article is for informational purposes only and does not constitute financial advice. Always conduct your own research before making investment decisions.