Ethereum Foundation Warns of Contract Risks Ahead of Glamsterdam Upgrade

The Ethereum Foundation is warning L1 contract maintainers about upcoming changes tied to the Glamsterdam upgrade, expected in Q4 2026. The upgrade will include gas repricings (EIP-8037 and EIP-8038) that shift state creation and access costs.

The foundation emphasized that most contracts will continue operating normally, but highlighted that a small set may break or degrade without updates. According to the foundation, replaying historical mainnet activity under the new schedule shows that only a tiny group of contracts is at risk.

The Glamsterdam upgrade aims to increase gas charges with actual computational work required and supports a performance target enabling roughly a 3x increase in base throughput. The Ethereum Foundation noted that this change is essential for future scaling, especially as Ethereum's state has grown significantly since the Berlin fork in 2021.