Current outcome
Ethereum developers confirmed Glamsterdam testnet dates and warned attackers could exploit free test ether and disposable builder identities to disrupt Sepolia block auctions by withholding transaction payloads; the Ethereum Foundation further announced the upgrade will activate on the Sepolia testnet on October 6, 2026, requiring node operators to update clients, with Hoodi and mainnet dates undecided.
Progress timeline
2 material updates- #01
Ethereum confirms Glamsterdam dates, but warns 'fake' builders could stall the chain
Ethereum developers confirmed Glamsterdam testnet dates while warning that attackers could exploit free test ether and disposable builder identities to disrupt Sepolia block auctions by withholding transaction payloads.
Source evidence: CoinDesk
- #02
以太坊基金会将于10月6日在Sepolia测试网上激活Glamsterdam升级
The Ethereum Foundation announced that the Glamsterdam upgrade will activate on the Sepolia testnet on October 6, 2026 (epoch 353,024, slot 11,296,768), requiring node operators to update execution and consensus clients; Hoodi and mainnet activation dates remain undecided.
State after update: Ethereum developers confirmed Glamsterdam testnet dates and warned attackers could exploit free test ether and disposable builder identities to disrupt Sepolia block auctions by withholding transaction payloads; the Ethereum Foundation further announced the upgrade will activate on the Sepolia testnet on October 6, 2026, requiring node operators to update clients, with Hoodi and mainnet dates undecided.
Source evidence: theblockbeats · Cointelegraph