The Cardano blockchain split into two chains due to a malformed delegated transaction triggering a software bug. The transaction was validated on the newer version of the node, but the older version of the software rejected it, causing the network to fork. The "toxic" transaction exploited a vulnerability in the underlying software repository to split the network into "poisoned" chains containing the transaction and "healthy" chains that did not, Cardano's eco-governance group Intersect said in ...