Ravencoin faces potential four-day transaction rollback after consensus exploit

Ravencoin faces a potential four-day transaction rollback after attackers exploited a critical consensus vulnerability on August 7, 2026. Dominant mining pools 2Miners and RavenMiner, which control a majority of the network's hash rate, are rebuilding the blockchain from block 4,487,775. This deep reorganization threatens to erase days of transactions, prompting exchanges like Upbit and Bitvavo to freeze RVN deposits. Amid the network turmoil, the RVN token crashed up to 20%, reducing its market capitalization to under $48 million.

Ravencoin consensus exploit

• ▪In July 2020, attackers previously exploited a Ravencoin code flaw that allowed them to mint approximately 31 million extra RVN tokens beyond the network's rules.
• ▪After the initial Ravencoin consensus vulnerability was demonstrated on the live network, other actors appeared to copy the exploit and produce invalid blocks of their own.
• ▪A critical consensus vulnerability on the Ravencoin blockchain allowed invalid blocks to be accepted by vulnerable nodes starting at block height 4,487,776 on August 7, 2026, at 15:44:01 UTC.

Mining pool rollback decision

• ▪RavenMiner paused its payouts, implemented an emergency node fix to mine a clean chain, and promised to cover any earnings shortfall resulting from the discarded attack-window blocks.
• ▪Ravencoin mining pools 2Miners and RavenMiner, which control a majority of the network's hash rate, rejected a developer request to use a more recent recovery point and are rebuilding the blockchain from block 4,487,775.

Transaction reversal risks

• ▪If the chain mined by 2Miners and RavenMiner becomes dominant, the Ravencoin network will undergo a deep chain reorganization of approximately three to four days.
• ▪Ravencoin transactions confirmed after block 4,487,775 are at risk of reversal, meaning completed payments could vanish from the record and return to the senders.

Exchange deposit suspensions

• ▪South Korean cryptocurrency exchange Upbit suspended Ravencoin deposits and withdrawals and placed an investment warning on RVN across its won, bitcoin, and tether markets.
• ▪Amsterdam-based cryptocurrency exchange Bitvavo temporarily suspended Ravencoin deposits and withdrawals as a precaution due to the network's consensus vulnerability.

Proof-of-work network concentration

• ▪Ravencoin was launched in 2018 as a fork of Bitcoin's code, utilizing a proof-of-work mining model to secure the network and issue digital assets.
• ▪Ravencoin experienced an influx of Ethereum miners and a jump in hash rate following the September 2022 Ethereum merge, which transitioned Ethereum from proof-of-work to proof-of-stake.

RVN price crash

• ▪The Ravencoin token price drop on August 11, 2026, reduced the cryptocurrency's total market capitalization to between $46 million and $48 million.
• ▪Following the disclosure of the consensus exploit on August 11, 2026, the price of the Ravencoin token fell between 17% and 20% over a 24-hour period.