Monero community turmoil as Qubic claims hashrate dominance

Uncover insights within the Web3 area. This article dives into: “Monero network turmoil as Qubic claims hashrate dominance”.

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

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

According to a Monday weblog submit, 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 beforehand legitimate blocks, in keeping with the Monero Consensus Status dashboard.

A six-block-deep reorganization is when the blockchain replaces the final six confirmed blocks with an alternate chain that’s longer or has greater cumulative work. While Qubic stated this reveals that it carried out a succesful 51% assault on Monero, others are unconvinced by the claims.

Developers dispute profitable assault declare

The declare drew rapid pushback from builders who argued that the reorganization alone doesn’t show a profitable 51% assault. SeraiDEX’s lead developer, Luke Parker, stated in an X submit {that a} six-block-deep community reorganization with block orphaning “does not mean a ‘51% attack’ was successful.”

“It does mean an adversary with a high amount of hash got lucky,” he added.

A 51% assault is when a single entity controls over half of a blockchain’s mining energy or stake, permitting it to rewrite transactions or block them completely. Zhong Chenming, the co-founder of crypto cybersecurity agency SlowMist, stated in a Tuesday X submit that “this time the 51% attack on Monero seems to have succeeded.” He added:

“The cost was also high, and it’s unclear what the economic benefits of doing this are in the end… In theory, the Qubic mining pool can now rewrite the blockchain, achieve double-spending, and censor any transactions.”

Related: Coin Metrics analysis reveals BTC and ETH are proof against 51% assaults

How the chain reorg unfolded

Qubic is a layer-1 blockchain that employs a “useful proof-of-work” mannequin to route mining towards artificial intelligence duties, which just lately rerouted its computing energy to attacking Monero (XMR).

In a June 30 weblog submit, Qubic revealed that it had begun incentivizing Monero CPU mining by way of its personal community. The mined XMR would then be used to fund buybacks and token burns for the Qubic ecosystem. “QUBIC miners now perform real-world tasks (Monero mining) that generate real market value, which in turn strengthens the QUBIC economy,” the submit acknowledged.

Sergey Ivancheglo, founding father of crypto initiatives Qubic, NXT and Iota, admitted on the time that his Qubic community was staging a takeover of the Monero community. In an X submit, he stated that after getting management of a lot of the community’s hashrate, Qubic would reject the blocks mined by different swimming pools.

Related: 51% assault on Ethereum harder than on Bitcoin — Justin Drake

The Monero neighborhood responded to Qubic’s financial assault in opposition to Monero in late July. The neighborhood responded to the continuing assault with its personal countermeasures, together with an alleged distributed denial-of-service assault in opposition to Qubic’s mining pool. At the time of the alleged six-hour-long DDoS assault, the mining pool’s hashrate fell from 2.6 gigahashes per second right down to 0.8 GH/s.

Amid the turmoil, Monero’s worth fell by round 8.6% to $248, in keeping with CoinMarketCap.

XMR’s 24-hour worth chart. Source: CoinMarketCap

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