Monero network turmoil as Qubic claims hashrate dominance

Qubic claims it has achieved 51% control of Monero’s hashrate, prompting debate over whether the resulting six-block reorganization was a successful attack.

Update (Aug. 12, 2025, at 1:30 pm UTC): This article has been updated to add a Qubic announcement.

Layer-1 blockchain Qubic said it has “completed its attempt to dominate the Monero network,” claiming a month-long push culminated Monday with 51% control of Monero’s hashrate.

According to a Monday blog post, the “month-long, high-stakes technical confrontation” concluded with Qubic reaching 51% of Monero’s hashrate. The effort coincided with a six-block-deep chain reorganization that discarded 60 previously valid blocks, according to the Monero Consensus Status dashboard.

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