Worst Monero Blockchain Reorg to Date Invalidates 118 Transactions

Monero experienced an 18-block reorganisation , its largest so far, which invalidated 118 confirmed transactions and rewound about 36 minutes of transaction history. The cause has been traced to Qubic , an AI-focused layer‑1 blockchain that recently gained control of over half of Monero’s mining power.

Qubic uses its Monero mining rewards to buy and burn its own token, following a system called “useful proof-of-work” (uPoW). Despite the disruption, Monero’s price briefly jumped to a two-month high of around $333, before sliding back to approximately $307.

5. Trading activity spiked significantly during this time.

Some in the Monero community are now considering the use of DNS checkpoints —external snapshots of the blockchain—as a way to prevent future reorganizations. However, this approach has sparked debate due to concerns over decentralization.