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Ethereum delays Glamsterdam test after security devs flag risk to existing contracts

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 23/10/2026, 05:10:23 UTC.

Briefings

Ethereum developers halted the Glamsterdam testnet activation following a security vulnerability identified by researchers. The issue involves new gas rules that could allow smart contracts to permanently record failed operations, creating a risk to existing contracts. This decision was made on October 23, 2026, after researchers demonstrated the potential flaw.

Key points

• Ethereum developers canceled the Glamsterdam testnet activation on Monday, October 23, 2026, after researchers identified a security flaw.
• The vulnerability stems from new gas rules that could permit smart contracts to permanently record failed operations, posing a risk to existing contracts.

Context

The Glamsterdam testnet is a test environment for Ethereum, and its activation was scheduled for Monday, October 23, 2026. The decision to delay was made after researchers demonstrated how new gas rules could introduce a security risk to existing contracts.

Limitations

Evidence is limited to the single incident of developers canceling the testnet activation. No specific numbers, dates, or named actors beyond the general Ethereum community are provided. The evidence does not specify the exact nature of the gas rules or the full scope of the security risk.

Generated by Bittrees-hosted qwen35-2b sha256:aaf42c8b7c3c on 23/10/2026, 05:13:29 UTC. Based on publisher-provided feed evidence; may not cover the full original article. Check the source for details.

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