Monero double-spending threat grows after block reorganization
The post Monero double-spending threat grows after block reorganization appeared on BitcoinEthereumNews.com.
XMR has experienced an 18-block blockchain reorganization that has led to blockchain observers raising alarms about double-spending attacks on the network. Monero users are now being advised that the usual practice of waiting for 10 confirmations before treating a transaction as final may be compromised following the 18-block reorganization on the network. ⚠️The attack against Monero is back. Hours ago XMR experienced a 18 block reorg If you accept XMR make sure to wait for more than the usual 10 confs pic.twitter.com/793j5WWXgZ — OrangeFren.com (@OrangeFren) September 14, 2025 18-block reorganization sparks double-spending concerns Monero (XMR) users have been put on high alert after the network experienced a rare and unusually deep 18-block chain reorganization. The event, confirmed by monitoring screenshots shared on X, has raised widespread concern that the crypto’s network is now vulnerable to double-spending attacks. A blockchain reorganization happens when competing versions of the chain are produced, and one overtakes the other. The “losing” chain’s blocks along with all the transactions inside them, will be discarded as a result. In Monero’s case, new blocks are created roughly every two minutes. An 18-block reorganization effectively rewrites more than half an hour of transaction history. While minor reorganization of one or two blocks can occur naturally in proof-of-work systems, an 18-block reorganization is highly unusual and suggests deliberate manipulation or an abnormal concentration of mining power. A security researcher and founder of SlowMist Cosine warned, “If the Monero community does not take block reorganizations seriously, this sword of Damocles will always hang over Monero’s head. It may not always result in a double-spend, but the ability to do so now exists — even without strictly controlling 51% of the network hash rate.” SloMist founder warns XMR recipients to wait for more than the usual 10 confirmations before accepting transfers as…
Filed under: News - @ September 14, 2025 7:21 pm