Litecoin rolls back three hours of blockchain history after its first major privacy-layer exploit!

Litecoin executed a chain reorganization covering more than three hours of transaction history to neutralize its first major privacy-layer exploit. During that window, attackers attempted double-spends against cross-chain swap protocols — infrastructure that depends on settlement finality to function safely.

A reorg of this magnitude is a significant event for any proof-of-work network. It required coordinated action from miners and node operators to invalidate an extended block range, erasing transactions that had already been broadcast and potentially acted upon by counterparties.

The double-spend attempts against cross-chain swap protocols are the most consequential detail: finality-dependent bridges and atomic-swap venues can be left holding invalid outputs even after a reorg clears. The full extent of any losses had not been confirmed at the time of reporting.