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Litecoin suffered a 13-block reorg due to a patched-but-not-fully-deployed vulnerability in its protocol.

Market News
26 Apr 2026
Coindesk
View Source
Bearish
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Attackers exploited a vulnerability in Litecoin's Mimblewimble Extension Block protocol that had been privately patched weeks before but not fully deployed across all mining pools. This led to a 13-block chain reorganization, rewinding about 32 minutes of activity. The attack took advantage of a window where some miners ran updated code while others remained vulnerable. The Litecoin network eventually corrected the chain once denial-of-service attacks stopped, but the foundation has not disclosed the amount of LTC affected or detailed the patch timeline publicly.

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