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Security incident halts Cosmos EVM chains; inve...

Pluang • August 25, 2026

Cosmos Labs is addressing a security incident impacting its Cosmos EVM module, prompting affected chains to halt validator operations while investigations continue. No specific vulnerability or affected chains have been publicly disclosed, and no losses have been reported so far. This follows security issues in 2026, including a $7 million exploit in January and recent disruptions in August. Cosmos Labs plans to release a full post-mortem report to guide when normal operations can safely resume, with market confidence currently subdued due to uncertainty.

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Cosmos EVM Module Security Incident Halts Multiple Chains On August 24, 2026, Cosmos Labs confirmed a security incident affecting its EVM module, prompting affected chains, including KiiChain, TAC, and MANTRA, to halt operations. KiiChain reported a significant loss of 148,326,583.15 KII tokens due to an attacker exploiting vulnerabilities in the shared module. TAC experienced a similar incident, draining a single account before halting its chain. MANTRA halted its operations as a precaution and later resumed after deploying a patch. Cosmos Labs has not disclosed specific vulnerability details or the total losses incurred. The situation follows earlier security issues in 2026, including a $7 million exploit in January. A full incident report is expected once the investigation concludes, and affected networks are advised to coordinate validator upgrades. The incident has raised concerns about the security of the Cosmos EVM infrastructure. 23 sources 69

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Cosmos Labs