Arbitrum news today is dominated by a security response that temporarily halted new Stylus contract activations on Arbitrum One and Arbitrum Nova, while governance discussions are scheduled for October 6, 2026. The pause, implemented by Arbitrum’s Security Council on October 2 and detailed in a notice published October 5, targets potential attacks involving hand-crafted WebAssembly (WASM) programs that could threaten chain liveness.