The Monero network suffered a new attack on September 14: a malicious mining pool (the Qubic) managed to rewrite (reorganize) 18 blocks of the blockchain, between heights 3,499,659 and 3,499,676.

As a consequence, 117 confirmed transactions were invalidated, reverting to the previous state, requiring resubmission for validation — something that undermines trust, as transactions considered completed returned to "non-existence."

Although Monero values privacy and anonymity, this attack on a significant scale exposed the risks related to the centralization of power in mining pools and revealed flaws in the defense mechanisms against block reorganizations.

Interestingly, the price of XMR did not fall: it grew almost 6% in 24h, from US$ 287 to US$ 306 — the market seems to have viewed the event as something manageable or already priced in.