Cardano Experiences Temporary Network Partition After Bug Triggers Mainnet Fork

• Malformed transaction triggered a temporary Cardano mainnet partition and dual chains.
• SPOs updating to version 10.5.3 are restoring the unaffected chain as the valid network.
• The individual admitted to causing the issue while testing, denying any financial intent.

Cardano’s mainnet experienced an unusual period of disruption after a malformed delegation transaction caused a temporary blockchain partition, resulting in slowed block production and UI inconsistencies across several services.

The incident emerged shortly after developers identified a similar issue on the testnet, prompting emergency engineering intervention and an accelerated rollout of a software fix to stake pool operators (SPOs). Although the event caused operational confusion, the blockchain remained functional throughout the episode, with both sides of the fork continuing to generate blocks unt…

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