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Feb 1, 2026
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Cardano's November Hack Explained by Co-Founder Charles Hoskinson
Charles Hoskinson, co-founder of Cardano, discusses the November hack that caused a chain split, highlighting the complexities of user reimbursement and the importance of security protocols. The incident emphasizes the need for ongoing improvements in blockchain security and the role of community support in navigating crises.
1

In a recent disclosure, Charles Hoskinson, the co-founder of Cardano, shed light on the notorious hack that rocked the platform in November. The incident, described as a 'poisoned transaction' hack, led to a significant chain split, causing confusion and distress among users. "I don’t wanna have to figure out, like, ‘How do we reimburse all these guys?’" Hoskinson remarked, highlighting the complexities involved in addressing the aftermath.
The hack raised eyebrows within the crypto community, leading many to question the robustness of Cardano's security protocols. As the incident unfolded, it became evident that the nodes of many users were unaware of the chain split. This lack of awareness resulted in users unknowingly following the protocol, leaving them vulnerable to the exploit. The situation emphasizes the need for constant vigilance and updates in the ever-evolving landscape of blockchain technology.
Understanding the mechanics behind the hack provides deeper insight into the vulnerabilities that even established platforms can face. The 'poisoned transaction' refers to a malicious transaction designed to disrupt the normal functioning of the blockchain. When it was executed, it spread through the network, leading to a bifurcation of the chain. This bifurcation created two separate paths for transactions, complicating the situation for users and developers alike.
For those unfamiliar with blockchain technology, a chain split occurs when there is a divergence in the blockchain, often due to a change in the protocol or, in this case, a security breach. Users who were following the original chain found themselves at a disadvantage, as their transactions were effectively rendered invalid on the new chain. This led to a flurry of discussions on social media and crypto forums, debating the implications of such vulnerabilities.
The fallout from the hack didn’t just impact individual users; it raised broader questions about the security measures employed by blockchain platforms. Hoskinson's candid remarks reflected the pressure he and his team faced as they navigated the aftermath. "We need to ensure that our users feel protected and that we can provide clear steps for recovery," he stated, emphasizing the need for transparency in their response.
In the crypto world, where trust is paramount, incidents like these can have lasting effects on a platform's reputation. Cardano, known for its academic approach and rigorous development process, found itself needing to reassure its community. Users began to express concerns about whether their assets were safe and how such a breach could have occurred in the first place.
The rapid pace of technological advancement in the blockchain space can sometimes outpace security measures, leading to gaps that malicious actors can exploit. Hoskinson acknowledged this reality, stating, "We are constantly working to improve our security protocols, but it’s a cat-and-mouse game. As we enhance our defenses, attackers are also evolving."
To combat these challenges, Cardano has committed to ongoing updates and improvements to its protocol. This includes more robust testing of potential vulnerabilities and an emphasis on user education. By ensuring that users understand the risks associated with their transactions, Cardano aims to fortify its community against future attacks.
Moreover, the incident has spurred a broader discussion within the crypto community about the importance of security audits and peer reviews. Platforms are being urged to adopt more stringent measures to protect their networks from similar breaches. This includes collaborative efforts among developers to share insights and strategies for improving overall security.
In the wake of the hack, the Cardano community has banded together to support affected users. Various initiatives have emerged to provide guidance on securing assets and navigating the complexities of the blockchain. This community spirit is a testament to the resilience of the crypto ecosystem, which often thrives on collaboration and shared knowledge.
As Cardano works to regain the trust of its users, the lessons learned from this incident will undoubtedly shape its future. Security remains a top priority, and the platform is committed to implementing measures to prevent such occurrences. The hack serves as a reminder that the crypto landscape is fraught with challenges, but with proactive measures and community support, platforms can emerge stronger.
While the November hack was undoubtedly a setback for Cardano, it has also opened the door for critical discussions about security in the blockchain space. As technology continues to evolve, so too must the strategies employed to safeguard user assets and maintain the integrity of the network. Moving forward, Cardano aims to not only recover but also to lead by example in establishing a culture of security and transparency within the cryptocurrency industry.
Cryptocurrency News
Cardano's November Hack Explained by Co-Founder Charles Hoskinson
Dec 23, 2025
Charles Hoskinson, co-founder of Cardano, discusses the November hack that caused a chain split, highlighting the complexities of user reimbursement and the importance of security protocols. The incident emphasizes the need for ongoing improvements in blockchain security and the role of community support in navigating crises.
1

In a recent disclosure, Charles Hoskinson, the co-founder of Cardano, shed light on the notorious hack that rocked the platform in November. The incident, described as a 'poisoned transaction' hack, led to a significant chain split, causing confusion and distress among users. "I don’t wanna have to figure out, like, ‘How do we reimburse all these guys?’" Hoskinson remarked, highlighting the complexities involved in addressing the aftermath.
The hack raised eyebrows within the crypto community, leading many to question the robustness of Cardano's security protocols. As the incident unfolded, it became evident that the nodes of many users were unaware of the chain split. This lack of awareness resulted in users unknowingly following the protocol, leaving them vulnerable to the exploit. The situation emphasizes the need for constant vigilance and updates in the ever-evolving landscape of blockchain technology.
Understanding the mechanics behind the hack provides deeper insight into the vulnerabilities that even established platforms can face. The 'poisoned transaction' refers to a malicious transaction designed to disrupt the normal functioning of the blockchain. When it was executed, it spread through the network, leading to a bifurcation of the chain. This bifurcation created two separate paths for transactions, complicating the situation for users and developers alike.
For those unfamiliar with blockchain technology, a chain split occurs when there is a divergence in the blockchain, often due to a change in the protocol or, in this case, a security breach. Users who were following the original chain found themselves at a disadvantage, as their transactions were effectively rendered invalid on the new chain. This led to a flurry of discussions on social media and crypto forums, debating the implications of such vulnerabilities.
The fallout from the hack didn’t just impact individual users; it raised broader questions about the security measures employed by blockchain platforms. Hoskinson's candid remarks reflected the pressure he and his team faced as they navigated the aftermath. "We need to ensure that our users feel protected and that we can provide clear steps for recovery," he stated, emphasizing the need for transparency in their response.
In the crypto world, where trust is paramount, incidents like these can have lasting effects on a platform's reputation. Cardano, known for its academic approach and rigorous development process, found itself needing to reassure its community. Users began to express concerns about whether their assets were safe and how such a breach could have occurred in the first place.
The rapid pace of technological advancement in the blockchain space can sometimes outpace security measures, leading to gaps that malicious actors can exploit. Hoskinson acknowledged this reality, stating, "We are constantly working to improve our security protocols, but it’s a cat-and-mouse game. As we enhance our defenses, attackers are also evolving."
To combat these challenges, Cardano has committed to ongoing updates and improvements to its protocol. This includes more robust testing of potential vulnerabilities and an emphasis on user education. By ensuring that users understand the risks associated with their transactions, Cardano aims to fortify its community against future attacks.
Moreover, the incident has spurred a broader discussion within the crypto community about the importance of security audits and peer reviews. Platforms are being urged to adopt more stringent measures to protect their networks from similar breaches. This includes collaborative efforts among developers to share insights and strategies for improving overall security.
In the wake of the hack, the Cardano community has banded together to support affected users. Various initiatives have emerged to provide guidance on securing assets and navigating the complexities of the blockchain. This community spirit is a testament to the resilience of the crypto ecosystem, which often thrives on collaboration and shared knowledge.
As Cardano works to regain the trust of its users, the lessons learned from this incident will undoubtedly shape its future. Security remains a top priority, and the platform is committed to implementing measures to prevent such occurrences. The hack serves as a reminder that the crypto landscape is fraught with challenges, but with proactive measures and community support, platforms can emerge stronger.
While the November hack was undoubtedly a setback for Cardano, it has also opened the door for critical discussions about security in the blockchain space. As technology continues to evolve, so too must the strategies employed to safeguard user assets and maintain the integrity of the network. Moving forward, Cardano aims to not only recover but also to lead by example in establishing a culture of security and transparency within the cryptocurrency industry.
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