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Ethereum & L2s · 1 min read

Ethereum Core Developers Postpone Glamsterdam Upgrade on Hoodi Testnet

Engineers delayed the scheduled Oct. 26 deployment to examine how EIP-8037 interacts with mainnet smart contracts, leaving a new activation epoch unset.

Editorial oversight: Julian Mercer, Chief Editor
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$ETH $2,405 −1.1%

At a glance Announced

What happened
Ethereum core developers postponed the Glamsterdam upgrade on the Hoodi testnet originally set for Oct. 26, 2026.
Why it matters
The delay allows developers to probe how EIP-8037 interacts with mainnet smart contracts before executing network state changes.
Who is affected
Hoodi testnet node operators, validators, client teams, and decentralized application developers.
Takes effect
2026-10-26
What's next
Core developers will publish a revised activation schedule at a later date once client configurations and contract checks are resolved.
Primary source
Ethereum Foundation Blog: Glamsterdam on Hoodi Postponed

Key points

  • Core developers agreed during ACDE #248 to postpone the Oct. 26 Glamsterdam upgrade on the Hoodi testnet.
  • The delay stems from the need to investigate potential interactions between EIP-8037 and mainnet smart contracts.
  • Hoodi node and validator operators must update client software prior to Oct. 26 to remove the previous activation parameters.

Ethereum core developers have officially postponed the Glamsterdam network upgrade on the Hoodi testnet, which was previously slated to execute on Oct. 26, 2026, at 17:42:48 UTC (epoch 132,352) 1. According to an announcement from the Ethereum Foundation, participants decided during All Core Devs Execution call #248 to delay the testnet deployment to allow for deeper analysis of how Ethereum Improvement Proposal 8037 interacts with existing mainnet smart contracts 1. At the time of writing, $ETH traded at $2,381, down 3.6% over the past 24 hours amid broader market softness.

The postponement cancels the scheduled activation of the Amsterdam execution layer and the Gloas consensus layer on Hoodi 1. In addition, the decision withdraws an associated configuration that would have expanded the Hoodi testnet's gas limit to 200 million units at the target epoch 1. The Ethereum Foundation clarified that the adjustment simply rolls back future upgrade configurations rather than reverting any transaction history on the Hoodi testnet 1. No replacement activation timestamp or epoch has been established yet 1.

Client Updates and Testing Guidance

Node operators and validators running infrastructure on Hoodi must update both their execution-layer and consensus-layer clients prior to Oct. 26 1. Client teams have started publishing revised builds that cancel the hard fork trigger; the Ethereum Foundation confirmed that Lodestar v1.50.1, Besu 26.10.1, Ethrex v30.0.1-rc.2, and Nethermind 2.2.1 include the updated testnet schedule 1. Operators utilizing external block-builder tooling or custom network settings must also align configurations to avoid maintaining the discarded activation epoch 1.

The schedule change supersedes previous deployment plans, following earlier notices where client teams unscheduled the upgrade across various repositories 1. Application developers have been advised to halt test plans premised on the Oct. 26 activation date until a replacement timeline is published 1. The delay applies exclusively to the Hoodi testnet environment; it establishes no mainnet schedule, and mainnet users and asset holders need not take action 1.

Sources

  1. [1] Glamsterdam on Hoodi Postponed — Ethereum Foundation Blog, October 22, 2026

Written by Basis Desk's newsroom system from the primary sources above and machine-verified against them before publication. Market figures marked "at the time of writing" come from live exchange data. Report an error: corrections@basisdesk.news · corrections policy.

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