MANTRA Chain resumed block production at 5:30 a.m. UTC on Aug. 22 after a roughly 30-hour outage caused by an exploit targeting its Cosmos-EVM module.

MANTRA said the vulnerability has been fixed and that no user funds were affected.

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

MANTRA is a Cosmos SDK-based proof-of-stake network focused on real-world asset (RWA) tokenization, a sector that has drawn growing institutional interest, and the Cosmos-EVM module at the center of the incident is the component that provides the chain's Ethereum-compatible smart contract functionality.

The network halt began late on Aug. 20, when MANTRA detected an attacker exploiting a vulnerability in an upstream software dependency. In response, developers shut down the mainnet entirely. The pause froze all transactions, staking operations, bridges, and inter-blockchain communication relays. Some exchanges also suspended deposits and withdrawals tied to the network. Public endpoints, validator services, and bridge infrastructure were taken offline during the incident. Full-chain halts are a rare but established emergency response in proof-of-stake networks; BNB Smart Chain took a similar step in October 2022, when validators suspended the network to contain a cross-chain bridge exploit that resulted in an estimated $100 million in losses. Vulnerabilities in upstream dependencies are also a recognized risk for networks built on shared open-source components, since a flaw in one library can affect every project that integrates it.

According to MANTRA, the issue was traced to its Cosmos-EVM module. The activity affected two wallet addresses before the threat was contained. Both were later identified as MANTRA-managed wallets. The project said there was no indication that user, exchange, or partner funds were directly affected.

"No user funds were exploited," MANTRA said in a post-incident update.

MANTRA has not said what activity took place in the two wallets, how much value was involved, or whether any assets were moved out of the addresses. The company said a full technical report is expected in the coming days.

Before restarting the network, developers took a complete snapshot of the blockchain at block 17,449,398, where the chain had stopped. The team then reviewed known attack paths before building and testing the patch.

Version 8.4.0 was first tested on the DuKong testnet and then validated in an internal environment that replicated mainnet conditions. Multiple upgrade rehearsals were completed before validators received the restart signal. MANTRA-operated validators were upgraded first, followed by partners, node operators, RPC services, and archive nodes. User balances remained unchanged throughout, and no blockchain rollback occurred.

During the incident, the MANTRA token fell from around $0.005060 to a record low of $0.004126, a decline of about 18.5%. The low was reached at roughly 11:10 p.m. UTC on Aug. 20, minutes before the network's last recorded block. Trading volume rose nearly 600% to around $24 million during the initial market reaction. The record low extended a longer slide for the OM token, which had lost roughly 90% of its value within hours in April 2025, a collapse the project attributed at the time to forced liquidations on centralized exchanges rather than a security breach.

MANTRA has not linked the price decline to the attack.

The DuKong testnet remained offline after the mainnet came back online. MANTRA said work to restore it would continue over the next several days.

A complete post-incident report covering the Cosmos-EVM vulnerability and the network's response is expected soon.