Incident All ledgers
Orbit Bridge: $81.7m
Orbit Bridge lost $81.7m on 31 December 2023. Ranked 51st of 1,272 crypto failures, with method, returned funds and comparable incidents.
- Date
- 31 December 2023
- Lost
- $81.7m
- Returned or repaid
- None recorded
- Target
- DeFi Protocol
- Category
- Input Validation
- Method
- Signature Verification Flaw
- Chains
- Ethereum
Orbit Bridge lost roughly $81.5M from its Ethereum vault after attackers compromised 7 of its 10 multisig signer private keys and used them to sign fraudulent withdrawals. The record also lists the loss as $81.7M.
Against the ledger
- It ranks 51st of the 1,272 incidents with a known loss, and 7th in 2023.
- It accounts for 83.1% of the $98.3m in known losses in December 2023.
- 66 incidents in the ledger are classified as Input Validation, for $755.5m in total. This one is 10.8% of that.
- The ledger records no returned funds.
Closest in size by the same method
| Date | Target | Lost | Type | Method | Returned |
|---|---|---|---|---|---|
| 28 Jan 2022 | Qubit | $80.0m | DeFi Protocol | Missing Input Validation | — |
| 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 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, “Orbit Bridge, failures ledger”, data to 2 November 2026, https://bitminer.io/ledger/incident/orbit-bridge-2023-12-31/. How this is built