How Arbitrum's freezes send transactions from an address without its key
Analysis of the Arbitrum Security Council's 30 October 2026 freeze of 8,425 ETH and 74,559,805.2 ARB on Arbitrum One, tied to the Binance exploit. In one L1 transaction, the council's 9 of 12 Safe used the UpgradeExecutor to swap the Inbox implementation, so the message arrived without address aliasing and landed as type 0x65 transactions with a zero signature. The post lists monitoring advice: alert on Inbox Upgraded events, since the EIP-1967 slot never showed the change.
Blockchain, Blue Team & Detection· Published and added 2 Nov 2026








































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