Is 1inch Safe?
Risk Grade: B- (31/100)
1inch is rated as moderate risk — some novel mechanisms, generally well-understood.
Moderate risk — battle-tested aggregator with 15+ audits, but third-party routing and recent infrastructure incidents keep it from a higher grade
A swap aggregator that finds the best prices across dozens of decentralized exchanges, saving users money on every trade. It has raised $190M in funding with a $280M fully diluted valuation. Its B- grade reflects solid auditing and a strong track record, offset by a $5M exploit on deprecated code in March 2025 and a frontend supply chain attack in October 2024.
TVL
$3M
Mechanisms
7
Interactions
5
Value Grade
B-
Key Risks for 1inch Users
A $5M hack in March 2025 drained funds through an old, outdated version of the swap contract. The current contracts were unaffected but the deprecated code should have been decommissioned sooner.
Your trades get routed through other exchanges that 1inch doesn't control. If one of those exchanges gets hacked, your swap could be affected.
The Fusion+ cross-chain system relies on professional middlemen called resolvers who can abandon your trade mid-execution during a market crash, leaving you with failed transactions.
Top Risk Factors
- •March 2025 buffer overflow in deprecated Fusion v1 allowed $5M drain; October 2024 supply chain attack on Lottie Player library compromised frontend ($768K). Two separate incidents within 6 months indicate infrastructure security gaps.
- •DEX aggregation routes through third-party protocols whose security is outside 1inch's control, inheriting risks from every liquidity source in the routing path.
- •Fusion+ cross-chain intent execution depends on relayer availability; during volatile markets resolvers may abandon in-flight swaps, causing failed transactions.
Risk Score Breakdown
1inch's highest risk area is Scale Exposure (5/10). Here's how each dimension contributes to the overall 31/100 score:
Read the Full 1inch Risk Report
This protocol has 2 collapse scenarios. 1 high-severity interaction risks identified. See the full mechanism classification, interaction matrix, and deep-dive recommendations.
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