Security incident · 2023-08-27
Balancer V2
According to the public DefiLlama incident dataset, Balancer V2 (Ethereum) suffered a security incident on 2023-08-27, with about $800K reported lost.
| Date | 2023-08-27 |
|---|---|
| Reported loss | $800K |
| Chain | Ethereum |
| Target type | DeFi Protocol |
| Technique class | Oracle Manipulation |
| Technique | Spot Price Manipulation |
| Bridge incident | No |
| Within 2023 | #96 by loss that year, 0.0% of all reported losses that year |
How this kind of attack works
The price feed the protocol relied on was pushed off for a short time, and the attacker borrowed or swapped at the distorted price.
Would a pre-payment check have helped
Oracle manipulation is a price-feed design problem.
Other incidents with the same technique
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- Venus Protocol2021-05-18 · $100.0M
- Bunny2021-05-19 · $45.0M
- Vee Finance2021-09-21 · $34.0M
- xToken2021-05-12 · $24.0M