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Zack Abrams

Cardano Blockchain Splits on Nov. 21 as Developer Exploit Triggers FBI Probe, IOG Engineer Resigns

Cardano suffered its first major chain split in eight years on November 21 after a malformed delegation transaction exploited a 2022 deserialization vulnerability. The network fragmented into two competing chains for several hours before converging through natural consensus by November 22. A developer publicly acknowledged causing the incident, while founder Charles Hoskinson's decision to involve the FBI prompted an IOG employee to resign over concerns about legal liability for coding errors.