Incident All ledgers
Qubit: $80.0m
Qubit lost $80.0m on 28 January 2022. Ranked 53rd of 1,272 crypto failures, with method, returned funds and comparable incidents.
- Date
- 28 January 2022
- Lost
- $80.0m
- Returned or repaid
- None recorded
- Target
- DeFi Protocol
- Category
- Input Validation
- Method
- Missing Input Validation
- Chains
- BSC
In late January 2022, an attacker exploited a validation flaw in Qubit Finance's QBridge deposit function, using a zero-address token with no ETH to mint qXETH and borrow assets, draining about $80 million.
Against the ledger
- It ranks 53rd of the 1,272 incidents with a known loss, and 12th in 2022.
- It accounts for 50.4% of the $158.6m in known losses in January 2022.
- 66 incidents in the ledger are classified as Input Validation, for $755.5m in total. This one is 10.6% of that.
- The ledger records no returned funds.
Closest in size by the same method
| Date | Target | Lost | Type | Method | Returned |
|---|---|---|---|---|---|
| 31 Dec 2023 | Orbit Bridge | $81.7m | DeFi Protocol | Signature Verification Flaw | — |
| 23 Mar 2022 | Cashio | $52.8m | DeFi Protocol | Missing Input Validation | — |
| 19 Apr 2024 | Hedgey | $44.7m | DeFi Protocol | Missing Input Validation | — |
| 02 Oct 2022 | Transit Swap | $28.9m | DeFi Protocol | Missing Input Validation | — |
| 15 Nov 2024 | ThalaSwap | $25.5m | DeFi Protocol | Missing Input Validation | — |
All failures in 2022 · 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, “Qubit, failures ledger”, data to 2 November 2026, https://bitminer.io/ledger/incident/qubit-2022-01-28/. How this is built