Ethereum Pauses Glamsterdam Hoodi Test Amid Compatibility and Security Concerns

WHO:

NewsBTC - Ethereum developers removed the planned Glamsterdam activation.

Cointelegraph - ChainSecurity identified potentially affected smart contracts and is coordinating with affected projects.

WHAT:

NewsBTC - Developers removed the planned Glamsterdam activation on the Hoodi testnet.

NewsBTC - Developers are investigating interactions between EIP-8037 and existing contracts; no replacement date has been announced.

Cointelegraph - ChainSecurity identified 13 real-world examples of smart contracts that may be affected by Glamsterdam’s gas changes.

WHERE:

NewsBTC - The planned activation was on the Hoodi testnet.

WHY:

NewsBTC - Developers removed the activation while investigating EIP-8037 interactions with existing contracts.

Cointelegraph - The delay was reported in connection with security risks and concerns about the effects of Glamsterdam’s gas changes on smart contracts.

HOW:

Cointelegraph - ChainSecurity is coordinating responsible disclosure with affected projects.

(UPDATED October 23, 2026 14:23 UTC)

Ethereum developers have removed the planned Glamsterdam activation from the Hoodi testnet while they investigate how the upgrade could interact with existing smart contracts. The review is focused on EIP-8037 and changes to gas costs, which may affect how some contracts operate. Security firm ChainSecurity has identified 13 real-world examples of contracts that could be affected. The findings have raised concerns about the risks of proceeding before those effects are understood. ChainSecurity is coordinating responsible disclosure with the projects involved, giving them a chance to address potential issues. Developers have not announced a replacement activation date. The pause gives the team time to assess the interactions and consider their implications for contracts already in use. For now, the planned testnet rollout is on hold as that work continues.