Euler smart contract audit by ChainSecurity

Euler Price Oracles

Security Audit

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The most critical subjects covered in our audit are functional correctness, oracle manipulation resistance and the correctness of protocol integrations.

All contracts show high security in all of the aforementioned subjects after the following issue has been successfully resolved: RedstoneCoreOracle update with stale data.

In summary, we find that the codebase currently provides a high level of security.

It is important to note that security audits are time-boxed and cannot uncover all vulnerabilities. They complement but don’t replace other vital measures to secure a project.

About Euler Price Oracles

Euler implements oracle contracts for different providers and a router that maps asset pairs to their corresponding oracle. The contracts are meant to be used in conjunction with Euler’s Ethereum Vault Kit (EVK).

Euler v2 is a modular lending platform with two main components at launch: 1) the Euler Vault Kit (EVK), which empowers builders to deploy and chain together their own customised lending vaults in a permissionless manner; and 2) the Ethereum Vault Connector (EVC), a powerful, immutable, primitive which give vaults superpowers by allowing their use as collateral for other vaults. Together, the EVK and EVC provide the flexibility to build or recreate any type of pre-existing or future-state lending product inside the Euler ecosystem.


ChainSecurity delivered an exceptional audit for our project. Their meticulous approach and quick responsiveness enhanced our security and provided crucial insights. We greatly appreciate their dedication and excellent communication throughout the process.
Erik Arfvidson, Head of Cybersecurity, Euler Finance