Aave Polygon contract upgrade causes temporary halt, impacting $110MM in assets

Aave’s Polygon deployment of Aave v2 was temporarily disrupted after a contract upgrade to the ReserveInterestRateStrategy introduced an interface mismatch with the Polygon version of the lending pool. BlockSec and other researchers reported that the bug caused certain actions such as deposits, borrows, and withdrawals to revert for a set of assets, leaving roughly $110 million to $120 million in USDT, WETH, WBTC, and WMATIC temporarily unusable rather than lost or at risk. The issue mattered because Aave’s Polygon instance used a slightly different legacy interface from Aave v2 on Ethereum, and the upgraded strategy was only compatible with the Ethereum-style interface. According to governance discussions and reporting, fixing the problem required a DAO proposal and voting process, which meant the disruption could last about a week before a patched contract change was executed. The incident highlighted the operational risks of maintaining slightly divergent contract designs across chains in a major DeFi protocol and drew attention to Aave’s governance and deployment complexity on Polygon.

✨ AI-generated background, compiled from web sources — not editorial content.

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