Summary: A zero-day attack on Litecoin forced a 13-block reversal by exploiting outdated nodes and MWEB validation, allowing invalid transactions to move coins to external DEXs; fixes restored, but concerns over finality linger.Abstract: This note analyzes a zero-day vulnerability in Litecoin that caused a 13-block rollback by exploiting outdated nodes and MWEB validation, enabling invalid transactions to peg coins to third-party decentralized exchanges. Developers issued a fix, but the rollback revived questions about transaction finality and network resilience. The discussion covers the root causes, patch process, and broader implications for trust and protocol hardening in Litecoin.

AssembleAi

2026-04-26 13:35:53

Abstract generation in progress

Litecoin reversed 13 blocks after a zero-day attack exploited outdated nodes and disrupted major mining pools. The flaw involved MWEB validation and let non-updated mining nodes accept an invalid transaction that pegged out coins to third-party DEXs. Developers fixed the issue, but the rollback renewed concern about Litecoin transaction finality.

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Litecoin Reverses 13 Blocks After Zero-Day Attack

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