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Cosmos EVM Bug Behind $5.7M Six-Chain Hack Was Cleared Too Early

Cosmos Labs says a critical Cosmos EVM vulnerability reported through its bug bounty programme in April was incorrectly judged not to affect production networks. Attackers exploited the vulnerability across six chains between August 20 and August 25, 2026. The activity moved about $2.87 million...
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5 Articles

Cosmos Labs admitted to knowing from April 25 the bug that, judged erroneously harmless, allowed an exploit of 5.7 million out of six blockchains. But the real problem is not the hack: it is the structural fragility of a model...

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Cosmos Labs admitted it mistakenly considered a vulnerability in the Cosmos EVM module to be insufficiently dangerous. As a result, the bug was used to attack six blockchains, with the total damage reaching $5.7 million. Between August 20th and August 25th, attackers exploited a vulnerability in Cosmos EVM to extract fu...

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A security vulnerability in the Cosmos network's software led to the theft of approximately $5.7 million worth of tokens from six blockchains between August 20-25. The vulnerability in Cosmos Labs' software allowed attackers to exploit large amounts of tokens across different networks… $5.7 Million Loss Across Six Chains: Patch First…

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https://www.cryptela.com broke the news on Saturday, August 29, 2026.
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