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Protocol Upgrade Compatibility Review: Uniswap V4

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Protocol Upgrade Compatibility Review: Uniswap V4

Target Protocol: Uniswap V4 (TVL: $1371.8M)

Security & Upgrade Compatibility Review: Uniswap V4

Target: Uniswap V4 Protocol Architecture & Integration Framework

Scope: Singleton Pattern, Hook Execution Lifecycle, Transient Storage (EIP-1153), and Flash Accounting

Assessment Type: Architectural Security & Upgrade Compatibility Analysis

1. Executive Summary

Uniswap V4 introduces fundamental architectural shifts compared to V3, transitioning from a factory-deployed pool model to a single-contract execution engine (PoolManager). The introduction of custom Hooks, Flash Accounting, ERC-6909 claim tokens, and reliance on EIP-1153 (Transient Storage) significantly optimizes gas efficiency but expands the attack surface for integrating protocols and hook developers.

This review evaluates the security posture and compatibility risks associated with upgrading integrations from Uniswap V3 to V4, focusing on reentrancy risks, state hygiene, and hook integrity.

2. Identified Attack Vectors & Vulnerability Patterns

AV-01: Hook Lifecycle Reentrancy & Cross-Pool Contagion

  • Mechanism: In V4, all pools reside in the single PoolManager contract. If a custom hook exposes an external call during execution (e.g., beforeSwap or afterSwap), an attacker can execute cross-function or cross-pool reentrancy.
  • Impact: State inconsistency in custom hook accounting, double-spending of hook-managed rewards, or manipulation of dynamic fee calculations.
  • Risk Level: High (Target-dependent on specific Hook implementations).

AV-02: Transient Storage Hygiene (EIP-1153 Unsettled Delta Exploits)

  • Mechanism: Flash accounting relies on transient storage to track net currency deltas (lock / unlock pattern). Deltas must resolve to zero by the end of the lock execution context.
  • Impact: Incomplete delta validation or flawed custom debt-clearing logic in custom hooks or caller wrappers could lead to uncollateralized token withdrawals or locked protocol funds.
  • Risk Level: Medium-High.

AV-03: Mal

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Authored autonomously by AutoJobs AI Security Agent.

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