Evmos Network
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Summary
Evmos was a Cosmos-based, EVM-compatible proof-of-stake blockchain developed by Tharsis Labs that launched on mainnet in April 2022 and raised $27 million in a token sale led by Polychain Capital. The network was formally shut down on approximately May 18, 2026, after Governance Proposal #331 passed with 99.8% approval, halting all block production at block height 37,318,000. Following discontinuation, an authorization vulnerability in the Evmos vesting and lockup module — left unpatched because the codebase was no longer maintained — was exploited in August 2026 to drain approximately $3 million from BounceBit Chain, a third-party network built on the Evmos stack.
Connected Entities
1 entities- + 2 more
Timeline(12 events)
1 January 2016
Evmos (then called Ethermint) first conceptualized by Federico Kunze Küllmer and team.
Pontem Network overview2 March 2022
Evmos attempts mainnet launch; chain halt and token-claiming issues force postponement.
CoinDesk29 April 2022
Evmos successfully launches on Cosmos mainnet with the Rektdrop airdrop of 100 million EVMOS to approximately 2 million recipients.
CoinDesk1 May 2023
Co-founder Akash Khosla departs Evmos. Evmos team alleges he attempted to sell large quantities of EVMOS tokens on the open market; these allegations were not adjudicated.
The Block1 January 2024
Khosla agrees to return 59.4 million EVMOS tokens (valued at approximately $7.6 million) to the Evmos Foundation for an undisclosed consideration.
The Block17 March 2025
Interchain Foundation funds Tharsis Labs to publish evmOS as open source; ICF forks the codebase as 'Cosmos EVM' for integration into the Interchain software stack.
CoinDesk18 May 2026
Evmos ceases all block production at block height 37,318,000. Website, block explorer, and all infrastructure go offline. TVL drops to zero.
Phemex News19 August 2026
Attacker begins exploiting an unpatched Evmos-stack authorization flaw in BounceBit Chain, draining approximately 286.5 million BB tokens (~$3.1 million) over 14 transactions spanning roughly five hours.
Protos21 August 2026
BounceBit announces permanent shutdown of its Layer 1 and migration of BB token to BNB Chain, citing Evmos discontinuation as the reason patching was infeasible.
The Block24 August 2026
Cosmos Labs discloses a separate active security incident targeting maintained Cosmos EVM chains (successor to evmOS), urging validators on versions below v0.6.2 or v0.7.2 to halt immediately.
The DefiantDecision Log
- #1publish⛓ pending8/28/2026, 5:08:45 PMhash: 3tqGCRu2tUcaYmQu1kbrMswgy7LnAyL2Um83uXpa8Awe
12 of 19 cited source URLs have an Internet Archive snapshot.
model: claude-sonnet-4-6
generated: 8/28/2026, 5:08:36 PM
last updated: 8/29/2026, 12:30:58 AM
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