MANTRA Chain Restores Operations Following Extended Network Downtime Due to EVM Security Flaw

Key Takeaways

Table of Contents

MANTRA Chain successfully restarted block production on Aug. 22 at approximately 5:30 a.m. UTC following an emergency shutdown lasting roughly 30 hours
An exploit targeting a security flaw in the network’s Cosmos-EVM module forced developers to halt all network operations, including transactions, staking mechanisms, and bridge functionality
Developers rolled out version 8.4.0 with comprehensive security enhancements and vulnerability patches before coordinating a network restart with validators
The exploit impacted two addresses controlled by MANTRA’s team, while community member assets remained secure
The native token experienced an 18.5% decline to all-time lows throughout the crisis, as trading volumes surged by approximately 600%

The MANTRA Chain network has successfully returned to full functionality after engineering teams addressed a critical security vulnerability in its Cosmos-EVM integration that forced an extended shutdown of approximately 30 hours.

MANTRA Chain is producing blocks again.

The vulnerability in the Cosmos-EVM module has been fixed, the network has resumed, and no user funds were affected.

Thank you to everyone for your patience throughout the incident.

Review the full history of incident status updates… pic.twitter.com/IDVpw7H7Tp

— MANTRA | The EVM L1 for RWAs (@MANTRA_Chain) August 22, 2026

Network operations recommenced around 5:30 a.m. UTC on August 22, following the successful implementation of software version 8.4.0, which included comprehensive patches for the identified vulnerability along with enhanced security measures.

The security incident originated on August 20 when MANTRA’s monitoring systems identified unauthorized exploitation of a weakness in an upstream software component. In response, the development team made the decision to implement a complete network halt.

This emergency shutdown effectively disabled all network functionality, including transaction processing, staking mechanisms, cross-chain bridges, and inter-blockchain communication protocols. Several cryptocurrency exchanges responded by suspending deposit and withdrawal services for the affected network.

Throughout the shutdown period, all public-facing endpoints, validator infrastructure, and bridge services remained inaccessible.

Details of the Security Incident

MANTRA‘s investigation identified the vulnerability’s origin in the Cosmos-EVM module. The suspicious activity was limited to two specific wallet addresses before the development team successfully contained the threat.

Subsequent analysis confirmed that both affected addresses were under MANTRA’s direct control. According to the project’s official statements, no evidence suggests that assets belonging to users, exchange platforms, or partner organizations were compromised.

“No user funds were exploited,” MANTRA confirmed in their post-mortem communication.

The project has not yet revealed specific details regarding the nature of the unauthorized activity within those addresses, the total value potentially at risk, or whether any digital assets were transferred out. A comprehensive technical analysis is scheduled for publication in the near future.

Prior to initiating the restart sequence, the engineering team created a comprehensive snapshot of the blockchain state at block height 17,449,398, the point where network activity ceased. This was followed by an exhaustive review of potential attack vectors before developing and validating the security patch.

The updated version 8.4.0 underwent rigorous testing on the DuKong testnet infrastructure, followed by validation in a controlled environment that mirrored mainnet conditions. The team conducted multiple simulated upgrade procedures before authorizing validators to begin the restart process.

Validators operated by MANTRA initiated upgrades first, with partner validators, independent node operators, RPC providers, and archive nodes following in sequence. All user account balances remained intact throughout the process, and no blockchain state rollback was necessary.

Market Impact and Price Movement

Throughout the security incident, MANTRA’s native token declined from approximately $0.005060 to an all-time low of $0.004126, representing a decrease of roughly 18.5%. The lowest price point occurred around 11:10 p.m. UTC on August 20, shortly before the network recorded its final block.

Market activity intensified significantly, with trading volume increasing nearly 600% to reach approximately $24 million during the immediate market response. MANTRA has not publicly attributed the price decline specifically to the security exploit.

The DuKong testnet infrastructure has not yet been restored following the mainnet recovery. MANTRA indicated that restoration efforts for the testnet will continue throughout the coming days.

A detailed incident report examining the Cosmos-EVM vulnerability and the comprehensive response strategy is anticipated for release in the near term.

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