Ethereum developers will not fork Glamsterdam on the Hoodi testnet until smart contract risks are resolved, according to Cointelegraph, which reported the news on 6 November 2026. The Defiant also reported the pause the same day. The reports say developers are investigating concerns tied to eight smart contract invariants linked to Glamsterdam's EIP-8037 and EIP-8038. This account is labeled unverified: it was reported by established outlets but not confirmed at the source. [1] [2]

Separately, the Ethereum Foundation Blog published a post on 6 November 2026 that is labeled confirmed, as it is a primary source. The post states that Chainsecurity found a few projects that would be vulnerable after Glamsterdam because they rely on certain invariants. It says those invariants are broken by EIP-8037 and EIP-8038, which rework how much gas is charged for certain operations and how gas is charged for state. [6] [7]

The Defiant reported that the Ethereum Foundation called for contract checks after Glamsterdam security findings. According to that report, most of the findings involve fixed gas budgets and reserves. [3] [4]

The Defiant also reported that the Hoodi testnet upgrade remains paused, with no confirmed mainnet activation date. [5]

What remains unconfirmed is the pause itself and the details around it: the Cointelegraph and Defiant reports are labeled unverified, and the outlets' account of the eight invariants and the Foundation's call for checks has not been confirmed at the source. The Foundation's blog post, which is confirmed, addresses the vulnerability findings and the gas changes but does not state a mainnet activation date. [1] [2] [3] [5] [6] [7]