Ontology halts mainnet block production over potential security concern

Ontology has temporarily halted mainnet block production after its core developers identified a potential security concern during a routine check, leaving on-chain transactions suspended while validators conduct an emergency review. Summary Ontology has temporarily halted mainnet block production after its core developers identified a potential security concern during a routine security check. No confirmed security incident or user asset loss has been identified, with ONT, ONG and other on-chain assets currently considered unaffected. On-chain transactions will remain unavailable during the security review, and users have been advised to avoid time-sensitive transactions. Ontology has not set a restart time and said block production will resume only after the network has been assessed and deemed safe. The Ontology Network said in an official announcement that its core development team detected the potential issue during a daily security check and immediately moved to stop block production as a precaution. No security incident has been confirmed, and the team said it has found no evidence that ONT, ONG or other user assets have been lost or compromised. 🚨 Ontology Mainnet Emergency Pause Ontology has identified a potential security concern requiring immediate investigation. As a precautionary measure, block production has been temporarily suspended while our technical team and validators conduct a comprehensive security… pic.twitter.com/GfiXSW76lW — Ontology – The Trust Layer for AI & Web3 (@OntologyNetwork) August 31, 2026 Ontology mainnet remains paused during security review With block production stopped, transactions submitted to the Ontology mainnet cannot be processed until network operations resume. The team has not provided an estimated time for the restart and said the review will take priority over restoring the chain quickly. Ontology described the halt as a preventive measure, distinguishing it from a response to an active attack or confirmed theft. Developers and network validators are reviewing the mainnet and related components to determine whether the potential concern presents an actual security risk. Users have been told not to move ONT, ONG or other assets because of the announcement. However, the network advised against attempting time-sensitive on-chain transactions while the pause remains in place. “Block production will remain temporarily suspended,” Ontology said, adding that the network will not restart until it has been “sufficiently assessed and deemed safe to operate.” The team has not disclosed the technical nature of the potential security concern, which component triggered the review or whether developers have identified a vulnerability requiring a software change. Ontology said it is working with validators and relevant ecosystem partners during the investigation. A separate announcement will be released before or when block production resumes, after the security assessment and any required upgrades have been completed. No user asset losses have been identified The network emphasized that the current investigation has not produced evidence of compromised user funds.