MANTRA Chain halted block production at 23:44 UTC on Aug. 21 while it investigated a security incident, freezing public endpoints and transactions. Deposits and withdrawals were also temporarily affected, according to Coinfomania.
MANTRA said the event involved an attempted exploit of a vulnerability in an upstream dependency used by the chain. Resuming the network will require a patched release and a coordinated restart by validators, CoinGape reported.
Block production halt freezes MANTRA transactions and endpoints
The stoppage means the chain was not producing new blocks, leaving its public-facing endpoints and on-chain transactions frozen while the incident was assessed. The immediate disruption extended to deposits and withdrawals.
Available reports do not establish when services will return after the reported halt at 23:44 UTC on Aug. 21. MANTRA has said recovery depends on software remediation and validator coordination, not a routine restart.
Patched release and validator restart required
MANTRA characterized the incident as an attempted exploit targeting an upstream dependency, not as an issue confined to its own application layer. Operationally, that means the chain must deploy a patched release before validators can coordinate a restart.
No timetable for that restart was included in the supplied reporting. Until the patched software is released and validators act in coordination, block production remains the key measurable condition for a restoration of normal network activity.
Cosmos EVM’s ICS20 flaw
The Cosmos EVM security advisory lists version 0.6.0 as containing the fix for a critical vulnerability in the ICS20 precompile, disclosed by Cosmos Labs on March 9.
The advisory describes incorrect state handling during nested execution that could permit unauthorized repeated use of token balances.
MANTRA reported an attempted exploit involving a vulnerability in an upstream dependency used by the chain. The supplied materials provide no further technical details of the incident, and the advisory’s technical description does not itself establish the mechanics of that reported exploit.
OM reached a reported all-time low before halt
At 23:10 UTC on Aug. 21, MANTRA’s OM token fell to about $0.004126, roughly 34 minutes before block production stopped. QQLink, citing CoinDesk and CoinGecko, described the level as a reported all-time low.
That sequence establishes timing, not causation: the reported price decline preceded the halt, while the available evidence does not establish a causal connection between it and the security incident.
