Euler V2 is a modular lending protocol that ships every market as a separately deployed vault. The Euler Vault Kit (EVK) makes vault deployment permissionless; the Ethereum Vault Connector (EVC) lets vaults compose. As of April 2026, Euler V2 holds $890M in TVL on Ethereum, per DefiLlama's Euler V2 page. The protocol relaunched in mid-2024 after the original Euler shut down following the March 2023 exploit.
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The V2 architecture is conceptually similar to Morpho Blue (permissionless markets, immutable per-market parameters, curator layer above) but ships richer composition primitives via the EVC. This guide walks the EVK and EVC, compares Euler V2 to Morpho Blue and Aave V3, and outlines the use cases each unlocks.
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Euler V2 is two related primitives: the Euler Vault Kit (EVK) — a smart-contract template for deploying lending vaults — and the Ethereum Vault Connector (EVC) — a coordination layer that lets multiple vaults share collateral, run cross-vault liquidations, and compose into multi-vault strategies.
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The EVK ships a vault contract that anyone can deploy. Each vault has:

The EVC is a separate singleton contract that vaults register with. Once registered, a vault can verify a user's overall solvency across all the user's positions in EVC-registered vaults — not just within a single vault. This enables cross-vault collateralization without forcing every market into one monolithic pool.
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The full implementation lives in the euler-vault-kit GitHub repo and the ethereum-vault-connector repo.
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An EVK vault behaves similarly to a Morpho Blue market: a permissionless lending primitive with immutable parameters at deployment. The differences are in flexibility.
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EVK vaults can be configured as:

This vault-type taxonomy means Euler V2 supports both Morpho Blue's "immutable primitive" model and Aave's "governed pool" model in the same protocol. Different curators can pick different governance postures.
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The EVC is the most novel piece of Euler V2. It solves a structural problem with isolated lending markets: users want their collateral in one market to count against borrows in a different market without manually shuffling deposits.
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How it works: a user enables EVC for their account. When they take an action (borrow, withdraw collateral) in any EVC-registered vault, that vault calls into the EVC to check the user's total solvency across all their positions. If the user is solvent, the action proceeds. If not, the action fails or triggers a liquidation.
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This produces "cross-vault collateral" without merging vaults into a monolithic pool. A user can deposit wstETH into Vault A (escrow only), borrow USDC from Vault B, and borrow WETH from Vault C, with the EVC enforcing solvency across all three. Each vault remains independently configured and risk-isolated; the EVC handles cross-vault accounting.
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The trade-off is that EVC users are exposed to the EVC contract's correctness — a bug in the EVC could affect every vault. The contract has been audited multiple times (Spearbit, ChainSecurity, Certora formal verification); audit reports are in the EVC repo.
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Euler V2's structural advantage over Morpho Blue is the EVC — cross-vault collateralization without giving up market isolation. Morpho's structural advantage is simpler audit surface (no EVC equivalent) and the curator vault layer's earlier maturity. Aave V3's advantage over both is the depth of liquidity in the main pool.
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Euler V2 carries the modular-lending risk surface (curator risk, market risk, oracle risk) plus EVC contract risk. The protocol relaunched after the March 2023 exploit on Euler V1, which was a flaw in the donateToReserves function. The V2 codebase is structurally different from V1 and underwent multiple audit rounds before mainnet launch.
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For users, the practical posture: stick to vaults deployed by recognized curators (Re7, Steakhouse, MEV Capital), avoid anonymously-deployed vaults, and read the oracle docs. The EVC layer adds power and adds risk; users not using cross-vault collateralization can interact with vaults individually and avoid EVC dependency.
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For the broader risk taxonomy, see the DeFi Lending pillar.
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Euler V2 is Ethereum-only as of April 2026. Depositors holding stablecoins on other chains must bridge to Ethereum to access Euler vaults. Eco handles this as a single intent across 15 supported chains, settling in seconds. For curators sourcing depositor funds across chains and for individual lenders moving capital between Euler and other lending venues, the cross-chain leg becomes invisible. Eco Routes (CLI + API) is the integration surface.
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The EVK's flexibility produces a vault taxonomy in practice. Looking at deployed Euler V2 vaults as of April 2026:

The ecosystem reflects what Euler's design enables: specialized curators serving specialized depositor preferences. A risk-conservative depositor stays in the curated stablecoin vaults; a yield-chasing depositor explores aggregator or long-tail vaults; an institutional depositor with cross-asset liquidity needs uses the EVC.
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The EVC's solvency check is worth understanding in detail because it's the most architecturally novel feature. When a user attempts an action (borrow, withdraw collateral) in any registered vault:

This is gas-expensive — a multi-vault solvency check costs significantly more gas than a single-vault check in Aave. But it enables a structurally different lending experience: a user with deep collateral positions across vaults can borrow against the aggregate, not against per-vault deposits.
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For users with simple single-vault positions, the EVC adds no value and adds gas overhead. The EVC is opt-in per account: users who don't enable it pay no overhead. The architecture serves multiple use cases without forcing complexity on simple users.
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Euler V1's March 2023 exploit ($197M loss) was a vulnerability in the donateToReserves function that allowed manipulation of the protocol's reserve accounting. The exploit was eventually returned by the attacker after extensive negotiation, but the protocol shut down rather than restart on the same codebase.
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V2 was redesigned with several explicit lessons baked in:

The lessons matter for users evaluating Euler V2. The team has demonstrated specific awareness of past failure modes and structural responses to them — which is more reassuring than a clean track record on a new protocol with no past stress.
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Like Morpho, Euler V2 has produced a curator marketplace where specialized risk underwriters compete for depositor capital. The notable curators as of April 2026:

Curators charge performance fees similar to Morpho's range (5–15% of generated yield). The competition between curators on Euler V2 is in early stages — Morpho has a 2-year head start on the curator economy — but the structural conditions exist for similar specialization to develop.
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Euler V2 uses the EUL token for governance, with a token-staking model where stakers underwrite protocol-level bad debt in exchange for a portion of protocol fees. The model is conceptually similar to Aave's Safety Module but applies only to vaults that opt into protocol-level bad-debt coverage.
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For depositors, this matters because vaults can be configured with or without protocol-level bad-debt coverage. Vaults with coverage have an implicit insurance layer; vaults without coverage rely entirely on overcollateralization buffers. Reading the vault's configuration before depositing is essential.
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Two cases where Euler V2 is the wrong choice:

Euler V2's strengths are concentrated in cross-vault collateralization, vault customization, and curator specialization. For users who need those features, it's a strong choice; for users with simpler needs, peer protocols may be a better fit.
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The EVC is a singleton contract that lets multiple Euler V2 vaults share collateral accounting without merging into one pool. A user's solvency is computed across all EVC-registered vaults, enabling cross-vault collateralization with per-vault risk isolation.
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No — V2 is a structurally different codebase. V1 shut down after the March 2023 exploit. V2 launched in mid-2024 with a new architecture (EVK + EVC) and multiple independent audits.
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Both are permissionless modular lending primitives. Euler V2 adds the EVC layer for cross-vault collateralization and supports both governed and immutable vault types. Morpho Blue's vaults are always immutable and don't have an equivalent of the EVC.
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Yes. The EVK is permissionless. Anyone can deploy a vault with their chosen parameters. Vault discoverability and depositor trust then become the question — most depositor capital flows to vaults deployed by recognized curators.
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Euler V2 is live on Ethereum as of April 2026. Additional EVM chain deployments are in the governance pipeline. See the lending pillar for the broader chain coverage.
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