Ethereum core developers have officially postponed the rollout of the Glamsterdam hard fork on the Hoodi testnet. The protocol upgrade was originally scheduled to launch on the Hoodi testnet on October 26, 2026. The decision to delay was made after researchers identified security risks in the network’s gas calculation system.
The Hoodi testnet was established as a testing ground before the Glamsterdam package is deployed to the mainnet. The discovery of security risks during the preparatory phase prompted developers to hold the launch schedule to prevent potential technical issues from reaching the public testing phase.
ChainSecurity Audit Findings
Warnings regarding security risks in Glamsterdam were first disclosed by blockchain audit firm ChainSecurity on October 13, 2026. The firm’s audit report highlighted two key proposals included in the Glamsterdam upgrade package: EIP-8037 and EIP-8038.
ChainSecurity warned that both upgrade proposals could potentially weaken the network’s defenses against ‘insufficient gas griefing’ attacks. The highlighted vulnerability is closely related to how the system calculates gas consumption when processing transaction instructions on the blockchain.
How the Flaw Affects Smart Contracts
The Ethereum Foundation confirmed that the postponement on the Hoodi testnet was enacted to provide the development team with time to conduct a technical investigation. The primary focus of the inquiry is examining how the Glamsterdam upgrade proposals interact with active smart contracts on the Ethereum network.
This technical evaluation centers on dissecting how the network handles failed transactions. The interaction between EIP-8037 and EIP-8038 code and active smart contracts is being re-evaluated to ensure the gas calculation system does not trigger vulnerabilities when a transaction fails to complete.
Fate of the December Mainnet Release
The setback in the Hoodi testnet testing schedule has introduced uncertainty regarding the target launch of Glamsterdam on the Ethereum mainnet. Previously, developers projected that the protocol upgrade could go live on the main network in early December 2026.
That early December target is now on hold because the testnet trial process cannot yet commence. Ethereum developers emphasized that they will only reschedule the mainnet release once testing and security evaluations on the Hoodi testnet are fully finalized.
For application developers and users within the Ethereum ecosystem, this postponement prioritizes asset protection over the rapid rollout of new features. Certainty surrounding the Glamsterdam release timeline now awaits the outcome of a comprehensive evaluation of the gas calculation code on the Hoodi testnet.
Sourced from Cointelegraph.
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