“We have identified the vulnerability and are proceeding to prepare a patched release,” the team said.
MANTRA’s network operators, known as validators, remain offline while developers prepare and test the fix. Restarting the blockchain will require coordination with the wider group of operators that verify transactions and keep the network running.
The project is also tracing fund movements and working with exchanges while it assesses the damage. It has not disclosed which software was exploited, how the attack worked or whether any assets were lost.
“Our assessment of the full impact is ongoing and we are not yet in a position to confirm the complete scope,” MANTRA said.
The outage affects the chain’s public endpoints, validators, bridge operations and MANTRA-managed links used to communicate with other blockchains.
The incident follows a difficult period for the project. MANTRA’s former OM token collapsed more than 90% in April 2025 in a bizarre sell-off, wiping out more than $5 billion in market value.
Inveniam Capital Partners, which invested $20 million in MANTRA last year, said in June it planned to acquire the project. The deal is expected to close in the third quarter.
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