Incident All ledgers
KyberSwap Elastic: $48.0m
KyberSwap Elastic lost $48.0m on 22 November 2023. Ranked 76th of 1,272 crypto failures, with method, returned funds and comparable incidents.
- Date
- 22 November 2023
- Lost
- $48.0m
- Returned or repaid
- None recorded
- Target
- DeFi Protocol
- Category
- Token & Share Accounting
- Method
- Rounding Error
- Chains
- Ethereum, Base, Polygon, Optimism, Arbitrum
On November 22, 2023, an attacker drained about $48M from KyberSwap Elastic across several networks by exploiting a double rounding error in its swap calculation that let prices pass the target without liquidity being updated.
Against the ledger
- It ranks 76th of the 1,272 incidents with a known loss, and 11th in 2023.
- It accounts for 14.9% of the $322.4m in known losses in November 2023.
- 160 incidents in the ledger are classified as Token & Share Accounting, for $1.45bn in total. This one is 3.3% of that.
- The ledger records no returned funds.
Other incidents named KyberSwap
| Date | Target | Lost | Type | Method | Returned |
|---|---|---|---|---|---|
| 01 Sept 2022 | KyberSwap Classic | $265,000 | DeFi Protocol | CDN Compromise | — |
Closest in size by the same method
| Date | Target | Lost | Type | Method | Returned |
|---|---|---|---|---|---|
| 28 Apr 2021 | Uranium Finance | $57.2m | DeFi Protocol | Arithmetic Error | — |
| 24 Aug 2026 | Nesa | $50.0m | Chain | Arithmetic Error | — |
| 02 May 2021 | Spartan | $30.5m | DeFi Protocol | Incorrect Share Accounting | — |
| 05 Mar 2021 | Paid Network | $27.0m | DeFi Protocol | Infinite Mint | — |
| 08 Jan 2026 | Truebit | $26.4m | DeFi Protocol | Arithmetic Error | — |
All failures in 2023 · 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, “KyberSwap Elastic, failures ledger”, data to 2 November 2026, https://bitminer.io/ledger/incident/kyberswap-elastic-2023-11-22/. How this is built