Ethereum's core developers have postponed the testnet activation of Glamsterdam, the network's next planned protocol upgrade, after security researchers raised concerns about how the changes could affect smart contracts already deployed on the chain. According to CoinDesk, developers canceled Monday's scheduled activation on the Hoodi test network after researchers demonstrated how new gas rules could let smart contracts permanently record failed operations.
Glamsterdam is the codename developers use for the next bundle of changes to the Ethereum protocol. Like previous Ethereum upgrades, it is made up of a set of individual Ethereum Improvement Proposals, or EIPs, each of which alters a specific part of how the network behaves. Before any such bundle is activated on Ethereum's main network, it is rehearsed on public test networks, which are separate chains that mirror Ethereum's software but carry no real economic value. Hoodi is one of those test networks, and it is where the current round of rehearsal was due to take place.
Reporting from crypto.news attributed the postponement to security concerns raised around EIP-8037, one of the proposals included in the upgrade. Decrypt described the delay as a response to gas-related security flaws. Gas is the unit Ethereum uses to meter computational work: every operation a smart contract performs carries a gas cost, and users pay fees based on how much gas their transactions consume. Periodically, developers propose repricing certain operations so that the cost of running them more accurately reflects the burden they place on the network's computers.
Repricing is technically delicate precisely because Ethereum contracts are immutable once deployed. Contracts written years ago may assume that a given operation costs a certain amount of gas, and may behave unexpectedly if that assumption changes. Per CoinDesk's account of the research, the specific worry here is that under the proposed rules, a smart contract could end up permanently recording an operation that actually failed — a state that developers of existing applications would not have designed for.
Pausing a testnet fork is a routine, if unwelcome, part of Ethereum's release process rather than an emergency. Test networks exist specifically to surface this type of problem before it can affect live funds, and upgrades have been rescheduled or had individual proposals dropped at this stage in the past. Based on the reporting reviewed, developers have signaled that the Hoodi activation is off October's calendar while contract risk is assessed; a revised timeline for the testnet fork and for any eventual mainnet activation was not specified in the coverage available at the time of writing.
The news landed during a soft stretch for digital asset markets. Coin Edition's 24-hour market recap, citing SoSoValue data, reported that the global crypto market capitalization fell 1.1% to $2.843 trillion, with ether changing hands around $2,403 — down roughly 1.3% on the day and 1.1% over the week — while bitcoin traded near $81,652. The same recap said U.S. spot ether ETFs recorded about $111 million in net outflows on October 22, led by BlackRock's ETHA at roughly $75.45 million. No published source reviewed here draws a causal link between the Glamsterdam postponement and those price or fund-flow moves, and market conditions in crypto are driven by many overlapping factors.
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Source: CoinDesk · 2026-10-23