<ul><li>The Ethereum's Pectra upgrade introduces EIP-7702 allowing users to delegate wallet control via offchain signatures.</li><li>However, a flaw in the upgrade can lead to a malicious signature rewriting wallet code and transferring control to an attacker's contract without requiring transaction confirmation.</li><li>Security experts warn that even hardware wallets are at risk of exposure if users unwittingly approve delegation messages, which can be difficult to detect due to their format.</li><li>Most individual wallets, including cold storage, need immediate updates to handle the new signature type to avoid potential instant and irreversible loss for users.</li></ul>

Ethereum’s Pectra Upgrade Unlocks Powerful Features — and a Dangerous Flaw

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