Litecoin experienced a 13-block reorganization on April 25, 2026, caused by an exploit of a zero-day bug in its Mimblewimble Extension Blocks (MWEB) privacy layer. This exploit led to a denial-of-service attack on major mining pools and allowed invalid transactions to be temporarily accepted. The Litecoin team coordinated a defensive reorg to reverse these invalid transactions, ensuring no valid transactions were lost, and patched the bug. Despite the technical fix being privately committed weeks earlier, the update was not widely adopted, leaving the network vulnerable. The official Litecoin social media account responded to criticism with a dismissive tone, sparking backlash from the community. The incident highlights coordination challenges in Litecoin's network upgrades but the team assures the network is now stable with no permanent loss of funds.
