Ethereum · CryptoSlate
Arbitrum pauses new Stylus activations over AI-assisted attack risks
Compiled by KHAO Editorial — aggregated from 1 source. See llms.txt for citation guidance.
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Arbitrum's Security Council temporarily blocked new Stylus contract activations on Arbitrum One and Nova in an October 2 emergency action, restricting programs and app updates that require fresh activation.
Key facts
- The linked Ethereum, Arbitrum One and Nova transaction records show successful execution on October 2, around 15:30 to 15:31 UTC
- Arbitrum's Security Council temporarily blocked new Stylus contract activations on Arbitrum One and Nova in an October 2 emergency action, restricting programs and app updates that require fresh
- The Council said it implemented the restriction by raising the activation gas requirement to a prohibitively expensive level
- The same emergency action installed a separate safeguard for BoLD's one-step proofs on Arbitrum One
Summary
01 The October 2 action blocks new Stylus activations on Arbitrum One and Nova, including updates requiring fresh activation. 02 Already-active Stylus programs continue until expiration, keepalive renewal remains available, and ordinary Solidity contracts are unaffected. 03 Accepted conflicting proofs can pause One's Ethereum settlement, delaying unconfirmed withdrawals while the chain continues processing. Arbitrum attributed the precaution to increasingly sophisticated AI-assisted attacks involving hand-crafted WebAssembly programs outside the standard Stylus compiler toolchain.