Ethereum Developers Cancel Glamsterdam Upgrade on Hoodi Testnet Scheduled for October 26

Ethereum developers have officially canceled the Glamsterdam upgrade that was scheduled to activate on the Hoodi testnet on October 26, 2026. Node operators are now advised to use client software that does not include the planned fork, with the timeline for mainnet activation remaining undecided.

The Glamsterdam upgrade, which combines execution-layer changes from the Amsterdam upgrade and consensus-layer changes from Gloas, was initially expected to enhance Ethereum's scalability. Key features included enshrined proposer-builder separation (ePBS) and block-level access lists aimed at improving transaction processing efficiency.

Despite having successfully activated on the Sepolia testnet earlier this month, the cancellation on Hoodi raises concerns about the stability and readiness of the upgrade. The decision indicates ongoing challenges in implementing the necessary protocol changes, which could impact market sentiment and Ethereum's price expectations.

For now, everyday ETH holders are not required to take any action, but Hoodi node operators and validators must adhere to the new guidance to ensure the integrity of test data. The Ethereum community will be closely monitoring for any updates from the Ethereum Foundation regarding a revised timeline for the Glamsterdam upgrade.