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.