Ethereum’s long-awaited Glamsterdam upgrade hits another roadblock as 13 security risks emerge

Ethereum developers have postponed the Glamsterdam upgrade on a major test network after identifying potential security risks affecting existing smart contracts. The Ethereum Foundation confirmed on Oct. 22 that the upgrade, scheduled for Oct. 26 on the Hoodi testnet, would no longer proceed as planned. Developers agreed to investigate how a proposed change to Ethereum's gas-accounting system could affect applications already operating on the blockchain. The setback threatens Ethereum's efforts to deliver Glamsterdam before the end of 2026, after the upgrade was previously pushed beyond its original first-half target. Developers had considered several activation dates in early December, but had not finalized a mainnet schedule.

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