Litecoin Discloses Zero-Day Vulnerability Leading to DoS Attack and Abnormal MWEB Transactions, Fixed After Block Reorganization

Litecoin disclosed on X platform that a recent zero-day vulnerability once led to a DoS attack, affecting the operation of major mining pools. Mining nodes that were not updated in time allowed an invalid MWEB (MimbleWimble Extension Block) transaction to be executed, enabling the relevant tokens to be withdrawn to a third-party DEX. The Litecoin network rolled back these invalid transactions through a 13-block reorganization (reorg), confirming they would not be included in the main chain. All valid transactions during this period were unaffected. The vulnerability has now been completely fixed, and the network has resumed normal operation.