Ethereum Hoodi Testnet Postpones Glamsterdam Activation After Security Concerns Surface

Key Takeaways

Table of Contents

Ethereum developers postponed the October 26 Glamsterdam activation on the Hoodi testnet.
ChainSecurity identified 13 real-world cases of potential smart contract security risks.
The postponement removes Hoodi’s planned gas limit increase to 200 million.
Developers have not confirmed new Hoodi or mainnet activation dates.
ETH trades below $2,400, with traders watching the $2,370 support and $2,415 resistance levels.

The Ethereum Foundation has delayed the Ethereum Glamsterdam upgrade scheduled for Hoodi testnet deployment after security analysts uncovered potential vulnerabilities affecting existing smart contracts. The October 26 launch has been canceled while ETH continues trading beneath the $2,400 threshold. Officials have yet to announce an alternative testing timeline.

Hoodi Testnet Launch Scrapped Following Developer Deliberations

Following a developer conference on October 22, the Ethereum Foundation revealed its decision to halt the deployment. Central to the review is EIP-8037, a proposal modifying gas calculation mechanisms for blockchain data creation that may impact contracts already operating on the network.

Ethereum postpones the Glamsterdam upgrade and cancels Monday's Hoodi testnet activation after security developers flagged risks to existing contracts.
Just another reminder that protocol upgrades can be fragile.
— lenny 🥷 (@blockchainlenny) October 23, 2026

The delay eliminates both Amsterdam and Gloas implementations from Hoodi’s scheduled configuration. Additionally, a proposed expansion of the gas limit ceiling to 200 million has been shelved. According to the Foundation, existing transaction records and Hoodi’s operational history will remain intact.

ChainSecurity Flags Transaction Failure Response Issues

On October 13, blockchain security firm ChainSecurity issued warnings regarding EIP-8037 and EIP-8038, noting these proposals could modify how contracts respond when transactions fail. Specific smart contracts evaluate remaining gas reserves to determine whether a failed operation should halt execution or proceed. Legacy contracts frequently depend on these verification mechanisms for maintaining security protocols.

The proposed changes could result in failed operations leaving contracts with sufficient gas to continue processing. This scenario might cause an application to log a failure while simultaneously preventing retry attempts. Users could find themselves unable to resubmit failed requests.

ChainSecurity’s analysis revealed 13 active contracts vulnerable to these complications. The firm has withheld naming specific applications while privately notifying affected development teams. A separate report on Glamsterdam gas concerns provided additional analysis of the discoveries. Development teams continue evaluating whether protocol adjustments are necessary.

Testing Timeline Remains Uncertain for Node Operators

Glamsterdam successfully launched on Sepolia testnet during the first week of October. Hoodi represented the subsequent testing phase before full mainnet implementation. A December mainnet rollout has yet to receive official confirmation from developers.

Operators running Hoodi nodes and validators must review revised software guidelines before the originally scheduled October 26 date. Both infrastructure types require updates removing the canceled activation parameters. Mainnet participants and ETH token holders face no immediate action requirements, the Foundation clarified.

Ethereum Maintains Position Around $2,400 Level

ETH fluctuated within a $2,370 to $2,415 corridor during the trading session, posting approximately 0.5% losses. Meanwhile, Ethereum holders staked 35.9% of the supply throughout the third quarter, data from Bitwise indicates.

ETH continues hovering near $2,400. Previous Ethereum support analysis highlighted $2,350 as an additional threshold worth monitoring. These price parameters represent current market activity rather than a direct reaction to the Hoodi postponement. Breaking above $2,415 would signal an exit from the established range, whereas a drop beneath $2,370 would indicate intensified selling momentum.