MANTRA Chain is back online, but silent code changes spark developer concerns

According to CryptoSlate, MANTRA Chain restored mainnet block production on v8.4.0 six days after a security incident forced a chainwide halt. The project stated that user balances and external funds remained unaffected, though it has not identified the two managed wallets or the impacted amounts. Node operators were warned to re-pull the release tag after it was re-pushed during recovery. The final upgrade handler blocklisted one address and disabled three Cosmos vesting-account creation messages using the circuit breaker. A technical account and postmortem remain unpublished, leaving the exploit path, transaction hashes, and the potential connection to an earlier ICS20 flaw unexplained. CryptoSlate reported that while the network return resolved operational questions, the attacker's method and containment assessment are still missing. MANTRA's official timeline noted that mainnet resumed on August 22, with the incident marked resolved on August 24. However, status pages and announcement channels contained no postmortem links when checked on August 27. Developers continue to examine the exact final code changes as the project's public account stops short of providing complete technical explanations.