Summary

  • Ethereum core developers postponed Glamsterdam activation on the Hoodi testnet from October 26 2026 after ChainSecurity identified gas-related risks.
  • The delay stems from 13 potential issues that could affect existing smart contracts and pushes back mainnet candidate timelines.
  • Ethereum holds a market cap near $291.5 billion compared with Solana at $61 billion despite ongoing development pace questions.

Ethereum core developers postponed the Glamsterdam upgrade on the Hoodi testnet. They shifted it from the planned October 26 2026 activation at 17:42:48 UTC. ChainSecurity flagged 13 gas-related risks to existing smart contracts days before the fork.

This testnet delay hits early December mainnet candidate plans.

The postponement happened on October 22. It spotlights fresh hurdles for Glamsterdam amid ongoing Solana comparisons.

Context

Glamsterdam targets better user experience, data discoverability, and larger message sizes. These changes aim to prevent sync failures. Ethereum keeps nearly five times the market cap of Solana while posting higher daily trading volume.

The upgrade sits in ongoing roadmap work on scalability and contract behavior.

Core developers canceled the Hoodi fork after the security review surfaced. This move avoids disruptions to live contracts that use current gas mechanics.

Details

ChainSecurity noted that Glamsterdam changes gas charging and returns. This allows contracts to record permanent failures after out-of-gas calls.

"Glamsterdam changes gas charging and returns allowing contracts to record permanent failures after out-of-gas calls."

, ChainSecurity

The risks focus on how out-of-gas conditions meet new return values. Existing contracts could act unexpectedly under the revised rules. Developers now need extra audit and testing cycles before any new activation date.

Ethereum's modular design contrasts with Solana's monolithic approach. Market data from Messari shows Ethereum's capitalization advantage holds even as upgrade timelines slip.

Ethereum's next steps center on fixing the flagged gas issues before any new testnet date. Observers should track Glamsterdam progress against competing roadmaps.