Ethereum Sets Glamsterdam Testnet Dates Amid Fake Builder Spam Concerns

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Ethereum developers have confirmed the schedule for the Glamsterdam upgrade, beginning with deployment on the Sepolia testnet. However, client teams have raised concerns that they will have roughly half the usual time to review changes before the Sepolia launch. A key vulnerability involves fake builders who can use free test ether to outbid legitimate rivals and withhold transaction payloads, potentially disrupting the network. This behavior could stall block production on the chain if left unaddressed. Developers are working to assess the risk before the upgrade proceeds further.

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