Yearn Vaults 3.1.0 adds emergency pause and deposit hooks
Yearn released vaults 3.1.0 in June 2026, an upgrade to its core vault code with two new features and three accounting fixes. Since Yearn does not use upgradeable proxies, existing vaults stay on their older code — the upgrade only applies to newly deployed vaults.
- Feature 1: emergency pause — the emergency manager can block ERC4626 user flows (deposit, withdraw, mint, redeem) during an incident to preserve depositor value.
- Feature 2: post-deposit and post-withdraw hooks — periphery modules react immediately after user flows, enabling allowlist-only or permissioned deposits; withdraw hooks can see the exit's strategy queue and cap or gate withdrawals.
- The Vyper compiler was bumped to 0.3.10, and three accounting bugs were fixed, including the withdrawal limit module now reading the same effective queue as redemptions.
- The changes were audited by yAuditDAO, with the full report published alongside the announcement.
Sources
- Any significant code change needs an audit, and this one was performed by @yAuditDAO. Full report: https://t.co/816YFHhWf2 Replying to their earlier post: Three accounting fixes: - the withdrawal limit module now reads the same effective queue that redemption uses - assessed unrealised loss can no longer round above the requested strategy withdrawal - n…x.com ↗
- Three accounting fixes: - the withdrawal limit module now reads the same effective queue that redemption uses - assessed unrealised loss can no longer round above the requested strategy withdrawal - no stale strategy debt when an unrealised loss eats the full withdrawal slice Replying to their earlier post: One simple change: we bumped the Vyper version to 0.3.10. This doesn't impact vault behavior, but keeps the compiler current.x.com ↗
- One simple change: we bumped the Vyper version to 0.3.10. This doesn't impact vault behavior, but keeps the compiler current. Replying to their earlier post: Withdraw hooks go further: they see the exit's strategy queue and can cap or gate withdrawals.x.com ↗
- Withdraw hooks go further: they see the exit's strategy queue and can cap or gate withdrawals. Replying to their earlier post: Feature 2: post-deposit and post-withdraw hooks. Periphery modules can react right after a user flow instead of polling state later. This enables features such as permissioned deposits, where a deplo…x.com ↗
- Feature 2: post-deposit and post-withdraw hooks. Periphery modules can react right after a user flow instead of polling state later. This enables features such as permissioned deposits, where a deployer wants to make an allowlist-only vault. Replying to their earlier post: Feature 1: an emergency pause. The emergency manager can block ERC4626 user flows (deposit, withdraw, mint, redeem) during an incident. In a worst-case event, this stops money flowing to preserve dep…x.com ↗
- Feature 1: an emergency pause. The emergency manager can block ERC4626 user flows (deposit, withdraw, mint, redeem) during an incident. In a worst-case event, this stops money flowing to preserve depositor value. Replying to their earlier post: First, a caveat: existing Yearn vaults that use older versions of vault code will not be upgraded. Yearn does not use upgradeable proxies, so this upgrade only impacts future vaults.x.com ↗
- First, a caveat: existing Yearn vaults that use older versions of vault code will not be upgraded. Yearn does not use upgradeable proxies, so this upgrade only impacts future vaults. Replying to their earlier post: Yearn code is battle hardened, but small upgrades to core logic do happen. Let's take a look at the upgrades in Yearn vaults 3.1.0, released in June 2026. It ships 2 features and 3 minor bug fixes. h…x.com ↗
- Yearn code is battle hardened, but small upgrades to core logic do happen. Let's take a look at the upgrades in Yearn vaults 3.1.0, released in June 2026. It ships 2 features and 3 minor bug fixes. https://t.co/STqMRqqEL3x.com ↗
