Litecoin was affected by a bug this weekend that allowed an attacker to transfer digital assets to a decentralized exchange, prompting the network to undergo a so-called reorganization to prevent someone from cashing in on crypto’s latest vulnerability.

The process, also known as a “reorg,” effectively purged faulty transactions from the network, which stemmed from a security flaw in Litecoin’s MimbleWimble Extension Block (MWEB) privacy layer, the digital asset’s official X account said in a post on Saturday.

With Litecoin blocks produced every 2.5 minutes on average, a 13-block reorg essentially rewrote around 30 minutes of the network’s transaction history. Eventually, entities mining Litecoin adopted a version of the asset’s blockchain where the bug was never exploited.

Although the attacker was ultimately stifled, they had taken advantage of what Litecoin's team said was a previously unknown vulnerability that allowed them to “peg out” coins from MWEB. At the same time, the bug allowed the bad actor to disrupt mining pools through a denial-of-service attack.

Litecoin acknowledged in an X post on Monday that it had deleted communications that followed the reorg, apologizing for trying to be humorous. Opt-in privacy features associated with MWEB, a “Harry Potter” reference, were first proposed in 2019.



In a since-deleted X post, Litecoin said that the network’s plumbing “was working throughout the entire process,” and reorgs naturally purge faulty transactions, effectively sending them “through the poop shoot [sic] like they were never there.”

The comparison didn’t land with Taylor Monahan, an on-chain sleuth and noted security expert, who warned in an X post that crypto projects should not strike a sanguine tone when unpacking technical issues that ultimately put users’ money on the line.

Litecoin’s X account, at times, has elbowed other networks for facing technical hurdles. When Solana suffered from network congestion and degraded performance in January 2025, for example, Litecoin called Solana “literally the pimple on crypto’s ass.”

Aurora Labs CEO Alex Shevchenko speculated in an X post that the attack was coordinated, while noting in a separate post that NEAR Intents, a multi-chain protocol, had around $600,000 in potential exposure. He later questioned whether the bug had truly gone undetected because some miners were running software where the vulnerability had already been patched.

Reorgs are possible on proof-of-work networks like Bitcoin, and the longest one that the asset’s network underwent rolled back 53 blocks in 2010, according to Bitcoin Magazine. At the time, a faulty transaction created 184 billion Bitcoin, which were later wiped away.

At a total value of $4.2 billion, Litecoin stood as the 25th largest cryptocurrency by market cap on Monday, according to CoinGecko. The digital asset’s price peaked around $410 nearly five years ago, while recently changing hands around $55.35—down about 1% over the last 24 hours.

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