Incident record · Under review

Unattributed: Security incident

A 12-person committee briefly rewrote one of Arbitrum’s core contracts to spend from an address it held no key for, then put the code back. It’s the second time this year.

StatusUnder review

Reported loss$30.0M

ChainArbitrum

Confidence55%

Evidence boundary

Confidence describes the coverage of the available evidence. It is not a safety rating and does not guarantee that a protocol or asset is safe.

Sources

https://www.coindesk.com/tech/2026/11/03/arbitrum-s-council-moved-usd30-million-of-binance-hack-funds-without-the-hacker-s-key

Record history

First seen: 2026-11-03T05:25:12.000Z. Last updated: 2026-11-03T06:35:09.901Z. Revision: 1.