Unknown miner(s) acquired 57.4% of Grin's network hash power on November 7-8, enabling 51% attack capabilities. The attacker reorganized at least one forked block, likely through rented hashrate from cloud mining services during a price surge.

According to reports, the Grin network has recently suffered 51% attacks. An unknown entity controlled more than 57% of network computing power on Saturday. According to the Grin website, the team advises people to wait for "additional confirmation on payment finality." According to a reminder announcement issued on the Grin website on November 9, "Important notice: Grin's network computing power has increased significantly in a short period of time. It is worth noting that this coincides with the time when the Nicehash rate doubled. Currently, more than 50% of the network computing The power is outside the known pool. Considering these circumstances, it is wise to wait for additional confirmation of the transaction to ensure the finality of the payment.” According to previous reports, on November 8, 2Miners tweeted that Grin Network is receiving 51 % Attacked, payment has stopped. Please do so at your own risk, as new blocks may be rejected.