Signal
Ethereum delays Glamsterdam testnet activation over contract security risks
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Published 2026-10-23 04:59 UTCUpdated 2026-10-23 12:45 UTC
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ethereumprotocol_upgradesecuritytestnetsmart_contracts
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Evidence trail (top sources)
top sources (4 domains)domains are deduped. counts indicate coverage, not truth.4 top sources shown
Overview
Ethereum developers have postponed the planned Glamsterdam activation on the Hoodi testnet after ChainSecurity identified gas-rule changes that could allow some smart contracts to permanently record failed operations. Reports say developers are reviewing the repricing proposal and its effects on contracts already deployed to mainnet.
Entities
ChainSecurityEthereumGlamsterdamHoodi
Why now
- The planned Hoodi activation was pulled after researchers identified potentially affected contract cases.
- Developers are assessing the repricing proposal before proceeding with further testing.
Why it matters
- The delay highlights compatibility risks when Ethereum changes gas rules for existing smart contracts.
- The review may affect the timing and design of the Glamsterdam testnet activation.
Evidence assessment
Recurring claims
- The planned Glamsterdam activation on Ethereum’s Hoodi testnet was delayed after security concerns were identified.
- ChainSecurity identified 13 real-world contract examples that could be affected by Glamsterdam’s gas changes.
- Developers are examining the repricing proposal against contracts already deployed on Ethereum mainnet.
How sources frame it
- Ethereum Developers And Security Researchers: neutral
Multiple reports describe the same Hoodi testnet delay and the security review behind it.
All evidence
All evidence
CoinDesk
coindesk.com · coindesk.com · 2026-10-23 04:59 UTC
Cointelegraph
cointelegraph.com · cointelegraph.com · 2026-10-23 05:09 UTC
Decrypt
decrypt.co · decrypt.co · 2026-10-23 11:49 UTC
Glamsterdam is off Hoodi’s October calendar as Ethereum checks contract risks
Crypto · crypto.news · 2026-10-23 12:45 UTC
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