Incident All ledgers
Uranium Finance: $57.2m
Uranium Finance lost $57.2m on 28 April 2021. Ranked 66th of 1,272 crypto failures, with method, returned funds and comparable incidents.
- Date
- 28 April 2021
- Lost
- $57.2m
- Returned or repaid
- None recorded
- Target
- DeFi Protocol
- Category
- Token & Share Accounting
- Method
- Arithmetic Error
- Chains
- BSC
Uranium Finance on BSC lost about $57.2 million after a flawed constant in its v2 pair swap check, 100x too large, let attackers put in minimal value and drain pool reserves.
Against the ledger
- It ranks 66th of the 1,272 incidents with a known loss, and 15th in 2021.
- It accounts for 47.1% of the $121.4m in known losses in April 2021.
- 160 incidents in the ledger are classified as Token & Share Accounting, for $1.45bn in total. This one is 3.9% of that.
- The ledger records no returned funds.
Closest in size by the same method
| Date | Target | Lost | Type | Method | Returned |
|---|---|---|---|---|---|
| 05 Jun 2022 | Elrond | $113.0m | DeFi Protocol | Infinite Mint | — |
| 24 Aug 2026 | Nesa | $50.0m | Chain | Arithmetic Error | — |
| 22 Nov 2023 | KyberSwap Elastic | $48.0m | DeFi Protocol | Rounding Error | — |
| 02 May 2021 | Spartan | $30.5m | DeFi Protocol | Incorrect Share Accounting | — |
| 05 Mar 2021 | Paid Network | $27.0m | DeFi Protocol | Infinite Mint | — |
All failures in 2021 · The failures ledger
Amounts are DefiLlama’s estimates and can change as incidents are revalued. Its returned figure can include money a company repaid itself, not only funds recovered from attackers. Source: DefiLlama.
Cite this Bitminer.io, “Uranium Finance, failures ledger”, data to 2 November 2026, https://bitminer.io/ledger/incident/uranium-finance-2021-04-28/. How this is built