Ronin Bridge
Ronin Bridge is the bridge associated with the Ronin network. BIR records the March 2022 validator-key compromise and the distinct August 2024 bridge-upgrade incident in which operator-weight initialization failed, enabling temporary unauthorized withdrawals that were returned by whitehat/MEV actors before the vulnerability was fixed and independently audited.
Bridge facts
- Canonical name
- Ronin Bridge
- Type
- Asset Bridge
- Status
- Active
- Confidence
- High
- Primary chains
- Ronin, Ethereum
- Primary assets
- ETH, USDC
- Operator
- Sky Mavis
- Ecosystem
- Ronin
- Launch date
- Unknown
- End date
- Unknown
- Terminal reason
- Not applicable / unknown
- Last reviewed
- 2026-09-04
- Last verified
- 2026-09-04
Incident cases
Ronin Bridge 2024 operator-weight initialization incident2024-08-06
On August 6, 2024, a Ronin Bridge upgrade left bridge-operator weight parameters uninitialized, causing the withdrawal authorization threshold to be misinterpreted. Whitehat/MEV actors temporarily withdrew approximately 4,000 ETH and 2 million USDC, the bridge was paused, the assets were returned, and a recovery proposal restored the operator weights. A Ronin-hosted Beosin audit later verified that fake-credential withdrawals failed after the fix.
Ronin Bridge validator-key compromise2022-03-29
In March 2022, Ronin Bridge was exploited after validator keys were compromised, leading to one of the largest reported bridge losses in crypto history. The incident later became a reference case for bridge validator and cross-chain security risk.
Evidence records
- Blockchains Have a 'Bridge' Problem, and Hackers Know ItWired · Tier 2 · 2022-04-03
- $620 million crypto theft linked to North KoreaAxios · Tier 2 · 2022-04-14
- North Korea Designation UpdateOffice of Foreign Assets Control · Tier 1 · 2022-04-14
- SoK: A Review of Cross-Chain Bridge Hacks in 2023arXiv · Tier 2 · 2025-01-06
- The Ronin Bridge Is OpenRonin · Tier 1 · 2022-06-28
- The Ronin Bridge Is OpenRonin · Tier 1 · 2022-06-28
- Community Alert: Ronin Validators CompromisedRonin Network · Tier 1 · 2022-03-29
- Ronin Bridge Security AuditBeosin Security Team · Tier 1 · 2024-08-21
- Ronin bridge pauses amid $11.8 million outflow to MEV bot white hatsThe Block · Tier 1 · 2024-08-06
- Ronin Bridge Security AuditBeosin Security Team · Tier 1 · 2024-08-21
Official URL status
Official URL recorded as live: https://bridge.roninchain.com/Help maintain bridge history
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