SparkLend Upgrade Review Flags Storage Collision and Governance Timelock Risks

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A compatibility review of SparkLend, a money market with roughly $5.06 billion in total value locked across Ethereum and layer-2 networks, examined its proxy-based upgrade architecture. The assessment identified storage-slot collision as a high-severity risk, since upcoming upgrades add state variables without reserved storage gaps. It rated upgrade-authority compromise as critical, citing a 24-hour governance timelock that is shorter than the 48 hours common among comparable protocols. Additional medium and lower-severity concerns included delegatecall-based interest-rate modules, cross-chain state synchronization on bridge adapters, and a reentrancy-guard bypass in the liquidation path. The reviewer concluded the upgrade framework is generally sound but needs stricter storage-gap discipline and a longer timelock.

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