On April 25, the Litecoin network experienced a significant block reorganization after attackers exploited a zero-day vulnerability.

Litecoin update:

• A zero-day bug caused a DoS attack that disrupted major mining pools.
• Non-updated mining nodes allowed an invalid MWEB transaction allowing them to peg out coins to third party DEX’s.
• A 13-block reorg reversed those invalid transactions — they will not…

— Litecoin (@litecoin) April 25, 2026

According to the incident report, unknown attackers launched a DoS attack that disrupted operations of major mining pools.

This allowed nodes running outdated software to validate invalid transactions on the MimbleWimble Extension Block.

Through these manipulations, the attackers were able to interact with invalid coins and send them to third-party DEX.

In response to the attack, developers executed a 13-block reorganization, nullifying the fraudulent transactions and removing them from the new chain.

“All valid operations during this period remain unchanged. The bug has been fully fixed, and the network is operating normally,” stated Litecoin representatives.

Alex Shevchenko, CEO of Aurora Labs, referred to the incident as a “coordinated attack.”

He noted that the reorganization affected blocks #3,095,930 to #3,095,943 and took over three hours, during which the attackers executed double-spending attacks against several cross-chain protocols.

The incident had little impact on the LTC price. At the time of writing, the coin is trading around $56, down 0.5% over the past day.

15-minute LTC/USDT chart from Binance. Source: TradingView.

Recall that in September 2025, Monero experienced the largest blockchain reorganization in 12 years, rolling back 18 blocks and invalidating 117 transactions.