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Arbitrum Halts New Stylus Activations on Arbitrum One and Nova After Security Review

AI Market Summary
Arbitrum's Security Council paused new Stylus contract activations on Arbitrum One and Nova after identifying a potential security risk from manually written WebAssembly programs. While existing contracts and permissionless renewals remain unaffected, the action signals elevated protocol risk and may temporarily slow developer deployment and on-chain activity. Coming amid recent security incidents, it can increase short-term uncertainty around Arbitrum's smart-contract environment.
Impact level
● Medium
Affected assets
ARB/USDT-1.01%
AI Insight · ARB/USDTAI Insight
▼ Bearish
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Arbitrum's Security Council took emergency action on Oct. 2 to pause the activation of new Stylus contracts on Arbitrum One and Arbitrum Nova, aiming to reduce security risks linked to manually written WebAssembly programs that could affect network activity. Introduced in September 2024, Stylus enables developers to build Ethereum-compatible smart contracts in languages such as Rust. Existing contracts remain subject to a default 365-day activation period, and renewals to keep contracts active are still permissionless. The move marks the latest in a recent series of security-related incidents involving Arbitrum.
ARB
ARB-1.03%
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