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Aug 31, 2026

Ontology halts mainnet block production over potential security concern

Ontology's development team stopped the blockchain's mainnet block production on August 31 after flagging a potential security issue during routine checks. The network remained halted with no confirmed incident or restart timeline disclosed.

Aug 31, 2026·3 sources

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Top claims

▪The last block produced on the Ontology mainnet before the suspension was block 20,770,893, recorded at 8:24:26 UTC on August 31, 2026
▪Ontology developers initiated the mainnet block-production halt as a preventive security measure after flagging a potential security concern during a routine daily check
▪The mainnet halt occurred approximately ten days after Ontology deployed its MainNet v3.1.2 upgrade around August 21, 2026

Topics

Blockchain nodes & clients Layer 1s Blockchain governance

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Blockchain Security

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