Arbitrum completes ArbOS 32 upgrade and fixes multiple security vulnerabilities, nodes must update immediately

ChainCatcher message, Arbitrum Developers stated that Arbitrum One, Nova, and Sepolia have completed the ArbOS 32 upgrade. Node operators need to upgrade their nodes to at least Arbitrum Nitro v3.2.0, and validator nodes need to upgrade to v3.2.1.

This upgrade was coordinated with its Security Council, which approved an emergency action to address: the mispricing issue in Arbitrum Stylus that could lead to denial-of-service attacks; the issue that allows malicious contracts to cause node crashes; and the mispricing issue where Stylus contracts are overcharged due to SLOAD operations. No funds are at risk. Additionally, the team is about to release a comprehensive analysis report.