Bridge entity
QBridge
QBridge was Qubit Finance's Ethereum-to-BNB Chain bridge and cross-chain collateral pathway. It is included because a January 2022 deposit-logic flaw allowed unbacked xETH minting and the withdrawal of roughly $80 million in assets from Qubit lending markets.
dead reviewed current
Bridge facts
- Canonical name
- QBridge
- Type
- Asset Bridge
- Status
- Dead
- Confidence
- High
- Primary chains
- Ethereum, BNB Chain
- Primary assets
- ETH, BNB, WETH, WBTC, USDC, USDT
- Operator
- Team Mound
- Ecosystem
- Qubit Finance
- Launch date
- Unknown
- End date
- 2022-01-28
- Terminal reason
- QBridge functions were disabled after the exploit, and reviewed reopening announcements covered Qubit lending markets rather than the bridge itself.
- Last reviewed
- 2026-06-14
- Last verified
- 2026-06-14
Incident cases
QBridge 2022 zero-value deposit exploit2022-01-27
In January 2022, a logic flaw in QBridge allowed an attacker to submit deposit calls without transferring ETH, mint unbacked xETH on BNB Chain, and use that collateral to withdraw roughly $80 million from Qubit markets.
Evidence records
- Protocol Exploit ReportQubit Finance · Tier 1 · 2022-01-28
- Qubit Bridge Collapse Exploited to the Tune of $80 MillionCertiK · Tier 1 · 2022-01-28
- Our Compensation Plan 1Qubit Finance · Tier 1 · 2022-02-08
- The Next Chapter: DAOBunny Finance / Team Mound · Tier 1 · 2022-02-11
- Qubit Markets ReopeningQubit Finance · Tier 1 · 2022-02-22
Official URL status
Official URL recorded as live: https://qbt.fi/