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The Cardano network has fully recovered after a rare event that resulted in a temporary split due to a malformed transaction that created two parallel versions of the blockchain.
According to a report published by the “Intersect” group that supports the development of Cardano, the problem began on November 20 when a corrupt authorization transaction exploited an old flaw in the cryptographic library on the “Preview” test network.
This creates a schism between a flawed transaction network and a healthy transaction network.
Cardano engineers worked overnight to fix the flaw, but the same transaction later reached mainnet and triggered a similar fork. The node operator quickly contained the issue by updating to version 10.5.3, which resulted in the network being re-merged into a single network.
The development team confirmed that user funds were not at any risk and that the wallet associated with the transaction has been identified, with preliminary investigations indicating a link to one of the previous participants in the test network.
The FBI was informed that the incident was being treated as a possible cyber attack.
Cardano founder Charles Hoskinson said the network had had a rough day but was not stopping, emphasizing the system’s resilience.
After the “Intersect” report was published, a user named “Homer J” came forward to admit that he was the one who performed the distortion, describing the matter as an uncalculated experiment that inadvertently caused division, and publicly apologized.
Hoskinson later said the assailant tried to recant his confession after realizing the FBI was following the case.
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