Ethereum core developers postponed the Glamsterdam upgrade’s deployment on the Hoodi testnet until security concerns involving eight smart contract invariants are resolved, according to an Ethereum Foundation blog post cited by Cointelegraph.
The delay follows an Oct. 13 report by smart contract auditor ChainSecurity. It found that two Ethereum Improvement Proposals, EIP-8037 and EIP-8038, could break contracts that depend on fixed assumptions about gas costs when external calls fail.
The Ethereum Foundation said some existing projects assume that certain operations will consume a specific amount of gas. The proposals would change how those operations are charged, invalidating those assumptions.
What the delay means
Postponing the Hoodi fork gives developers more time to identify affected smart contracts and determine whether changes are necessary before Glamsterdam moves toward mainnet deployment. The Foundation said the Hoodi fork would not proceed until the issues were resolved.
Glamsterdam had already gone live on the Sepolia testnet on Oct. 6, in one of its final major rehearsals. In a Sept. 28 blog post, the Foundation described the upgrade as advancing Ethereum’s layer-1 scaling roadmap through enshrined proposer-builder separation, block-level access lists and gas-pricing changes intended to better reflect execution costs.
The report did not specify a revised date for the Hoodi fork.
Original publication: Nov. 6, 2026, at 21:23:08 UTC+8. This article reflects the developments reported at that time.
Source: Cointelegraph’s original report.