Aave V4 Clears Formal Verification as Certora Confirms Core Protocol Security and Solvency

Key Takeaways:

• Certora has officially validated the core smart contracts of Aave V4, such as the Liquidity Hub and Spoke modules.
• The review ensured the accounting integrity, protocol solvency and adherence to formal security rules.
• After the launch of V4, Aave will keep the formal verification, AI security auditing and bug bounty programs.

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Before V4’s release, Aave’s clocks are ticking and blockchain security company Certora has finished a formal verification of Aave’s core architecture. The review has validated the correct mathematical specifications for key smart contracts, and Aave has a broader development initiative towards layered security.

Aave has announced that Certora have successfully completed the formal verification of Aave V4, which includes the protocol’s Liquidity Hub, Spoke contracts, Tokenization Spoke, and the mathematical libraries that underpin Aave.

Certora has formally verified Aave V4.

This process covered the Liquidity Hub and Spoke contracts, along with the underlying mathematical libraries.

The verification confirmed that the Solidity implementations of V4’s contracts are correct according to Certora’s formal rules. pic.twitter.com/L8w454LAuc

— Aave (@aave) July 8, 2026

A formal verification has a different objective from the conventional smart contract audit as well, which is to show mathematical proofs that the logic of a contract meets specific security rules.

Aave said the verification vouched for a correct Solidity implementation of contracts in V4, which aligns with Certora’s formal contract specification, adding credibility to accounting accuracy, protocol solvency, and operational safety.

The announcement follows a steady trend of growth in the number of deposits locking up in the Aave V4 protocol prior to broader adoption.

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There was a fundamental problem with the Liquidity Hub in an early version of the protocol, Certora found.

In the first stages, asset transfers were directly executed via the Hub with transferFrom. This design ensures that any “from” and “to” parameters can be set, which means that an attacker can use a previous token allowance, or even the Hub account to send and receive tokens.

In that case, anyone could create fraudulent collateral deposits, thus disrupting the protocol’s bookkeeping and the entire solvency of the system.

Certora made a recommendation to limit the transfer source to the initial caller. The architecture was then redesigned by Aave Labs, so that the asset transfers were offloaded from the Hub to the Spoke contracts. Certora checked the new implementation and confirmed the vulnerability has been completely removed.

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The formal verification was just a component of Aave’s overall security programme.

Certora collaborated with the team starting from the very early design stages, in the conversation with the architects even on-site during March 2025.

Aave also conducted a competitive audit selection process, reviewing more than 19 proposals from security firms, researchers, and tooling providers. The complete security program remained below its approved $1.5 million budget despite rising audit costs across the industry.

Rather than ending security efforts once V4 goes live, Aave said the formal verification framework will continue alongside protocol development. The team will also continue supporting invariant testing, enhance code scanning with AI features, and implement an on-going bug bounty initiative to further reinforce the measures taken by the protocol as it progresses.

Aave hopes to create a multilayered security approach by engaging in formal verification, manual review, fuzz testing, community bug bounties, and more.

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