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Cosmos Hub halt after Neutron attack stories

Sep 23, 2026

Cosmos Hub halts for 25 hours after Neutron governance attack

Cosmos Hub validators stopped block production for nearly 25 hours following a governance attack on Neutron that initially led to losses of approximately $9.5 million, moving 1.23 million ATOM from attacker wallets after restart.

Sep 23, 2026·6 sources

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Top claims

▪Cosmos Hub validators resumed block production at block 33,086,741 on September 23, 2026, at 12:00 UTC, ending the 25-hour network freeze triggered by the Neutron governance attack
▪An attacker passed Neutron governance proposal 9, titled "AIATO: AI Agent Takeover. Phase 1: Agent Admin Registration," on September 21, 2026, which reassigned administrative rights over 11 smart contracts
▪Cosmos Hub's forced seizure of the attacker's funds was justified

Subtopics

Blockchain governance1 Consensus mechanisms1 Crypto hacks1 DeFi1 Layer 1s1

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