Ethereum Delays Glamsterdam Hoodi Testnet Over Security Risks

Ethereum's Glamsterdam upgrade has been pushed back at the testing stage, with the launch of its Hoodi testnet delayed over security concerns tied to planned changes in how gas is calculated.

The security firm ChainSecurity said it identified 13 real-world examples of smart contracts that could be affected by Glamsterdam's gas changes. According to the firm, it is now coordinating responsible disclosure with the affected projects, meaning the details are being shared privately with teams so they can react before the findings become public.

Why gas changes matter

Gas is the unit that measures the computational work needed to run operations on Ethereum. Smart contracts are often written with assumptions about what those operations cost. When the cost of an operation changes, code built around the old numbers can behave differently than its authors intended, which is why repricing proposals tend to draw close scrutiny from auditors.

The finding of 13 concrete cases suggests the concern is not purely theoretical. The material available does not specify which projects are involved, what the exact failure modes are, or how severe the potential impact could be, and those details are being held back while disclosure is under way.

What it means for the roadmap

Hoodi is one of the public test networks where Ethereum upgrades are rehearsed before they reach the main network. Delaying its fork gives developers and affected teams time to assess the findings and decide whether protocol-level adjustments or contract-level fixes are needed.

For developers and users, the practical takeaway is that teams running contracts sensitive to gas costs should review their code against the proposed changes. A new schedule for the Hoodi launch has not been confirmed in the information provided, and the timing of the mainnet upgrade will depend on how the disclosure process and any resulting fixes unfold.