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.