Cardano details a mainnet chain partition, rapid node upgrades, and Charles Hoskinson’s unity call as the network regains stability.
Cardano released new details after a malformed transaction caused a temporary chain partition on the network. The ecosystem pushed swift upgrades to restore consensus, while Charles Hoskinson urged the community to stay unified during the incident.
Chain Partition Triggered by Malformed Transaction
Cardano developers confirmed that today’s disruption came from a malformed transaction that exposed a bug in a core software library. The fault caused the network to split into competing chains, slowing block production and creating visible delays across services.
At the same time, Stake Pool Operators (SPOs) reported divergence in block histories, prompting immediate coordination among engineering teams and ecosystem contributors. The split increased the urgency for a synchronized fix as nodes running older versions struggled to converge.
Intersect, the Cardano member-based organization, said upgrades to node versions 10.5.2 and 10.5.3 began restoring full network alignment. They emphasized that the healthy chain is already becoming dominant as operators adopt the updated software.
Cardano Temporarily Splits Into Two Chains After Attacker Uses AI-Generated Script to Exploit a Known Bug
Cardano co-founder Charles Hoskinson characterized the event as a targeted, premeditated attack by a disgruntled stake-pool operator who had been seeking ways “to harm the brand and reputation” of Input Output Global (IOG).
He warned the disruption affected all users from block producers losing rewards to DeFi protocols encountering inconsistent state and said restoring full network uniformity could take weeks.
There was a premeditated attack from a disgruntled SPO who spent months in the Fake Fred discord actively looking at ways to harm the brand and reputation of IOG. He targeted my personal pool and it resulted in disruption of the entire cardano network.
Meanwhile, an X user posting as “Homer J.” claimed responsibility, saying he acted alone, did not short or sell ADA, and did not intend to cause harm.
The user said he relied on AI-generated terminal commands to block external traffic while trying to replicate the malformed transaction and only realized the extent of the disruption when block explorers froze.
“I’m ashamed of my carelessness,” he wrote. “I didn’t have evil intentions, but I endangered the network and caused unnecessary stress.”
to rely on AI’s instructions on how to block all traffic in/out of my Linux server without properly testing it on testnet first, and then watched in horror as the last block time on explorers froze.
Coordinated Response Pushes Network Toward Full Recovery
According to Intersect, ecosystem teams mobilized quickly once the partition appeared. Engineers, SPOs, exchanges, and infrastructure providers coordinated in real time to stabilize the chain and ensure the patched clients were deployed across major operators.
A dedicated working group is now reconciling ledger discrepancies and validating block histories as part of the stabilization effort. Their goal is to confirm full convergence across all nodes before issuing a detailed after-action review.
Intersect stated that the initial report is already available, noting that further technical detail will follow once data reconciliation and reliability checks are complete.
Hoskinson Urges Calm and Unity After Overnight Incident
However, he noted that long-term success is not guaranteed and must be earned daily. He said progress requires “a positive attitude and a genuine belief” that the ecosystem can work through disagreements and philosophical differences to achieve shared goals.
Cardano Community Rallies as Full AAR Expected
Intersect thanked SPOs, exchanges, and community contributors for responding quickly under pressure. They said the collaborative effort demonstrated the network’s maturity and capacity to handle disruptive events.
The organization also confirmed that a comprehensive after-action review will be published once all technical evaluations are finalized. It will outline the root cause, the system behavior, and the steps taken to prevent similar incidents.
For now, developers continue monitoring the upgraded nodes as the patched chain becomes fully dominant. The ecosystem expects normal operations to resume as convergence finalizes.
Do you know what staking is ? Staking on the blockchain refers to the process where participants lock up a certain amount of cryptocurrency to support the operations and security of a blockchain network. In return, they earn rewards, typically in the form of additional cryptocurrency. Staking is often associated with proof-of-stake (PoS) or similar consensus mechanisms used by many blockchains.
