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Litecoin Hit by Zero-Day Vulnerability, Triggers 13-Block Reorganization

ID: 28c2826a-a889-587b-a0c5-d872644d0f73

STIX ID: report--28c2826a-a889-587b-a0c5-d872644d0f73

Feed Name: The Cyber Express

Threat Score
70/100

Date Published: 2026-04-27

Date Updated: 2026-04-27

Author: Ashish Khaitan

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A zero-day flaw in Litecoin's MWEB allowed an attacker to submit invalid MWEB transactions, triggering a denial-of-service condition that led to a rare 13-block reorganization and temporarily impacted several major mining pools; the Litecoin team rapidly confirmed the issue, issued a patch, and stated no funds were lost.

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