Litecoin 13-Block Reorg: MWEB Zero-Day Patched, Litecoin X Fires Back

Litecoin suffered a 13-block reorg on April 25, 2026, covering about 32 minutes of chain history. Litecoin says a “zero-day” bug in its MWEB privacy layer enabled a denial-of-service attack on major mining pools and allowed invalid MWEB transactions to be accepted by non-updated nodes. Attackers allegedly used those invalid transactions to “peg out” coins to third-party DEX platforms, while mining pools later coordinated a defensive reorg over roughly three hours to reverse the invalid transactions. Litecoin claims no valid transactions were permanently lost, and the network returned to normal once miners adopted a patched client. A key controversy followed the incident: Coindesk reviewed Litecoin’s GitHub and found core developers reportedly patched the MWEB consensus vulnerability privately between March 19 and March 26—around 37 to 40+ days before the April 25 exploit—yet the broader miner/node base was not forced to update in time. This has raised fresh questions about responsible disclosure and coordination. Separately, the project’s @litecoin X account responded aggressively to critics, posting that people should “stay on the shallow end” and mocking knowledge gaps about Proof-of-Work and reorgs. The tone sparked hostile replies, and Solana’s official account also joined with a sarcastic jab. For traders, Litecoin’s immediate technical impact appears contained (reorg rolled back invalid activity), but the disclosure/timing debate may add headline risk around LTC security confidence.