{"id":41030,"date":"2025-11-24T14:53:55","date_gmt":"2025-11-24T13:53:55","guid":{"rendered":"https:\/\/www.coinpro.ch\/uncategorized\/cardano-chain-split-makes-waves-what-happened\/"},"modified":"2025-11-27T13:06:03","modified_gmt":"2025-11-27T12:06:03","slug":"cardano-chain-split-makes-waves-what-happened","status":"publish","type":"post","link":"https:\/\/www.coinpro.ch\/en\/news-en\/cardano-chain-split-makes-waves-what-happened\/","title":{"rendered":"Cardano Chain Split Makes Waves: What Happened"},"content":{"rendered":"<p>Cardano was the target of a deliberate attack \u2013 founder Charles Hoskinson announced last Friday. Within a few hours, developers had managed to fend off the attack. In the meantime, however, a chain split occurred, causing damage of unknown extent. Investigations against the attacker are reportedly already underway.<\/p>\n<div class=\"row row-collapse align-middle row-comparison\"  id=\"row-1764167478\">\n\n\n\t<div id=\"col-1406376676\" class=\"col medium-3 small-6 large-3 small-col-first\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\n\n  <div class=\"banner has-hover\" id=\"banner-422854970\">\n          <div class=\"banner-inner fill\">\n        <div class=\"banner-bg fill\" >\n                                                \n                    <\/div>\n\t\t\n        <div class=\"banner-layers container\">\n            <div class=\"fill banner-link\"><\/div>            \n\n   <div id=\"text-box-1820177437\" class=\"text-box banner-layer text-box-circle x50 md-x50 lg-x50 y50 md-y50 lg-y50 res-text\">\n                                <div class=\"text-box-content text dark\">\n              \n              <div class=\"text-inner text-center\">\n                  \n\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_796148644\">\n\t\t<a class=\"\" href=\"https:\/\/www.coinpro.ch\/Bitvavo-Aktion\" target=\"_blank\" rel=\"noopener\" >\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1020\" height=\"340\" src=\"https:\/\/www.coinpro.ch\/wp-content\/uploads\/2023\/12\/bitvavo-mark-and-logo-black-1024x341.png\" class=\"attachment-large size-large\" alt=\"\" srcset=\"https:\/\/www.coinpro.ch\/wp-content\/uploads\/2023\/12\/bitvavo-mark-and-logo-black-1024x341.png 1024w, https:\/\/www.coinpro.ch\/wp-content\/uploads\/2023\/12\/bitvavo-mark-and-logo-black-300x100.png 300w, https:\/\/www.coinpro.ch\/wp-content\/uploads\/2023\/12\/bitvavo-mark-and-logo-black-768x256.png 768w, https:\/\/www.coinpro.ch\/wp-content\/uploads\/2023\/12\/bitvavo-mark-and-logo-black-1536x512.png 1536w, https:\/\/www.coinpro.ch\/wp-content\/uploads\/2023\/12\/bitvavo-mark-and-logo-black-2048x683.png 2048w\" sizes=\"auto, (max-width: 1020px) 100vw, 1020px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a>\t\t\n<style>\n#image_796148644 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_2090042783\">\n\t\t<a class=\"\" href=\"https:\/\/www.coinpro.ch\/Bitvavo-Aktion\" target=\"_blank\" rel=\"noopener\" >\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a>\t\t\n<style>\n#image_2090042783 {\n  width: 80%;\n}\n<\/style>\n\t<\/div>\n\t\n\n\n              <\/div>\n           <\/div>\n                            \n<style>\n#text-box-1820177437 .text-box-content {\n  background-color: rgb(255, 255, 255);\n  font-size: 100%;\n}\n#text-box-1820177437 {\n  width: 100%;\n}\n<\/style>\n    <\/div>\n \n\n        <\/div>\n      <\/div>\n\n            \n<style>\n#banner-422854970 {\n  padding-top: 99.99%;\n  background-color: rgba(255, 255, 255, 0);\n}\n<\/style>\n  <\/div>\n\n\n\n\t\t<\/div>\n\t\t\t\t\n<style>\n#col-1406376676 > .col-inner {\n  padding: 15px 15px 15px 15px;\n}\n<\/style>\n\t<\/div>\n\n\t\n\n\t<div id=\"col-902386923\" class=\"col col-comparison-description medium-4 small-12 large-4\"  >\n\t\t\t\t<div class=\"col-inner text-left\"  >\n\t\t\t\n\t\t\t\n\n<p style=\"margin-bottom: 1em;\">Bitvavo, one of the leading exchanges from Europe (Netherlands) with a large selection of cryptocurrencies. PayPal deposit possible.  <strong>Limited time offer: \u20ac20 bonus when you sign up via CoinPro.ch<\/strong><\/p>\n\n\n\t\t<\/div>\n\t\t\t\t\n<style>\n#col-902386923 > .col-inner {\n  padding: 15px 0px 0 15px;\n}\n@media (min-width:550px) {\n  #col-902386923 > .col-inner {\n    padding: 15px 0px 15px 15px;\n  }\n}\n<\/style>\n\t<\/div>\n\n\t\n\n\t<div id=\"col-636944942\" class=\"col col-comparison-stars medium-2 small-6 large-2 small-col-first\"  >\n\t\t\t\t<div class=\"col-inner text-center\"  >\n\t\t\t\n\t\t\t\n\n<p><span style=\"font-size: 200%;\"><strong>98%<\/strong><\/span><\/p>\n\n\n<span class=\"fsrs\"><span class=\"fsrs-stars\"><i class=\"fsrs-fas fa-fw fa-star \"><\/i><i class=\"fsrs-fas fa-fw fa-star \"><\/i><i class=\"fsrs-fas fa-fw fa-star \"><\/i><i class=\"fsrs-fas fa-fw fa-star \"><\/i><i class=\"fsrs-fas fa-fw fa-star \"><\/i><\/span><span class=\"hide fsrs-text fsrs-text__hidden\" aria-hidden=\"false\">5.0 out of 5.0 stars<\/span><span class=\"lining fsrs-text fsrs-text__visible\">5.0<\/span><\/span>\n\n<p><a href=\"https:\/\/www.coinpro.ch\/en\/reviews-en\/bitvavo-experiences-2025-the-crypto-exchange-under-review\/\">Read review<\/a><\/p>\n\n\t\t<\/div>\n\t\t\t\t\n<style>\n#col-636944942 > .col-inner {\n  padding: 15px 15px 15px 15px;\n}\n<\/style>\n\t<\/div>\n\n\t\n\n\t<div id=\"col-853268928\" class=\"col medium-3 small-12 large-3\"  >\n\t\t\t\t<div class=\"col-inner text-center\"  >\n\t\t\t\n\t\t\t\n\n<a href=\"https:\/\/www.coinpro.ch\/Bitvavo-Aktion\" target=\"_blank\" class=\"button primary box-shadow-2 expand no-margin\" rel=\"noopener\"  >\n\t\t<span>Sign up with a \u20ac20 bonus<\/span>\n\t<\/a>\n\n\n\n\t\t<\/div>\n\t\t\t\t\n<style>\n#col-853268928 > .col-inner {\n  padding: 15px 15px 15px 15px;\n}\n<\/style>\n\t<\/div>\n\n\t\n\n<\/div>\n<h2>Cardano Chain Split Makes Waves: What Happened<\/h2>\n<p>A chain split of the popular <a href=\"https:\/\/www.coinpro.ch\/en\/knowledge\/what-is-a-blockchain-basics-and-functionality\/\">blockchain<\/a> Cardano on November 21 has been causing a stir over the past few days. According to Cardano founder Charles Hoskinson, the problem has since been resolved and thoroughly investigated. It is said to have been a targeted and long-planned attack.<\/p>\n<blockquote><p>&#8220;It was a deliberate attack by a disgruntled SPO (Stake Pool Operator) who has extensive knowledge of Cardano, had already observed the testnet fork and patch efforts, and was in direct contact with the core developers,&#8221; <a href=\"https:\/\/x.com\/IOHK_Charles\/status\/1992605527206142058\">Hoskinson wrote<\/a> on X in a conversation with Solana developer Anatoly Yakovenko.<\/p><\/blockquote>\n<p>The Cardano developers at Input Output Global (IOG) were able to successfully diagnose and fix the problem within a few hours, Hoskinson further explained.<\/p>\n<p>The attacker is even personally known to Hoskinson. His attack was an angry reaction to the release of sensitive data by Hoskinson himself, the 38-year-old American wrote.<\/p>\n<p>On a Discord server called Fake Fred, the attacker planned his endeavor for several months and searched for a vulnerability before finding the exploited bug. He focused the attack on Hoskinson.<\/p>\n<blockquote><p>&#8220;He spent months on the Fake Fred server, actively looking for ways to harm IOG&#8217;s brand and reputation. He targeted my personal pool, which led to a disruption of the entire Cardano network.<\/p><\/blockquote>\n<p>After the incident, the person responsible even apologized \u2013 but only because he had been identified as the cause of the chain split, Hoskinson believes.<\/p>\n<blockquote><p>&#8220;He apologized because the ITN pool in my previously linked video referred to him, and he knew that criminal investigations had already been initiated.&#8221;<\/p><\/blockquote>\n<script type=\"text\/plain\" data-tcf=\"waiting-for-consent\" data-id=\"20572\" data-bid=\"1\" data-placement=\"33872\">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<\/script><h2>Was Cardano Offline as a Result of the Attack?<\/h2>\n<p>According to an <a href=\"https:\/\/x.com\/IOHK_Charles\/status\/1991967233246118262\">Intersect report<\/a>, the attacker was able to cause a so-called chain split by exploiting a bug in the node software&#8217;s program code. This creates two different versions of a blockchain that no longer work together. The previously unified network was thus split into two different networks.<\/p>\n<blockquote><p>&#8220;There were slowdowns due to the temporary network split. Cardano continued to produce blocks and maintained its integrity.&#8221;<\/p><\/blockquote>\n<div class=\"brlbs-cmpnt-container brlbs-cmpnt-content-blocker brlbs-cmpnt-with-individual-styles\" data-borlabs-cookie-content-blocker-id=\"x-alias-twitter-content-blocker\" data-borlabs-cookie-content=\"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\">\n<div class=\"brlbs-cmpnt-cb-preset-b brlbs-cmpnt-cb-x\">\n<div class=\"brlbs-cmpnt-cb-thumbnail\" style=\"background-image: url('https:\/\/www.coinpro.ch\/wp-content\/uploads\/borlabs-cookie\/1\/cb-twitter-main.png')\"><\/div>\n<div class=\"brlbs-cmpnt-cb-main\">\n<div class=\"brlbs-cmpnt-cb-content\">\n<p class=\"brlbs-cmpnt-cb-description\">You are currently seeing a placeholder content of <strong>X<\/strong>. To access the actual content, click on the button below. Please note that data will be passed on to third-party providers.<\/p>\n<p> <a class=\"brlbs-cmpnt-cb-provider-toggle\" href=\"#\" data-borlabs-cookie-show-provider-information role=\"button\">More information<\/a> <\/div>\n<div class=\"brlbs-cmpnt-cb-buttons\"> <a class=\"brlbs-cmpnt-cb-btn\" href=\"#\" data-borlabs-cookie-unblock role=\"button\">Unlock content<\/a> <a class=\"brlbs-cmpnt-cb-btn\" href=\"#\" data-borlabs-cookie-accept-service role=\"button\" style=\"display: inherit\">Accept required service and unblock content<\/a> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/div>\n<p>The program code of the Cardano blockchain was not affected by the bug. It could only affect the node implementation itself. According to Hoskinson&#8217;s statement, the consequences were nevertheless severe.<\/p>\n<blockquote><p>&#8220;Every single user was affected. SPOs lose block rewards. Double-spendings could occur. DeFi was disrupted. It will take weeks to clear up this mess, and even longer for the damage to the brand and reputation to be repaired,&#8221; he announced.<\/p><\/blockquote>\n<h2>Who is behind ADA&#8217;s Chain Split?<\/h2>\n<p>In an <a href=\"https:\/\/x.com\/StakeWithPride\/status\/1992693245927981556\">X-Space<\/a>, Charles Hoskinson named Australian programmer Greg Beresnev as the cause of the chain split. Beresnev has already admitted his guilt. The Australian works as a software developer for Yarris Technologies.<\/p>\n<p>There, the ADA founder also revealed further details. The error occurred due to a deliberately malformed transaction.<\/p>\n<blockquote><p>&#8220;It probably took several hours to figure something like that out. (&#8230;) You need very specific knowledge to recognize and exploit this bug,&#8221; Hoskinson argues.<\/p><\/blockquote>\n<p>Beresnev acquired his knowledge during test runs in the Cardano testnet and finally exploited his experience on the mainnet.<\/p>\n<p>On X, there are several <a href=\"https:\/\/x.com\/FredCardano\/status\/1991962148487262608\">critical voices<\/a> claiming that it was an accident. Developer Stutxo, for example, blames IOG itself. Therefore, numerous comments also contain mockery of Hoskinson.<\/p>\n<blockquote><p>&#8220;Someone performed a transaction on Cardano for the first time and the whole thing went wrong,&#8221; Stutxo says. Former Monero lead developer Riccardo Spagni reposted this assessment via X.<\/p><\/blockquote>\n<p>The alleged perpetrator also publicly apologized via X and asserted that it was not a public attack.<\/p>\n<div class=\"brlbs-cmpnt-container brlbs-cmpnt-content-blocker brlbs-cmpnt-with-individual-styles\" data-borlabs-cookie-content-blocker-id=\"x-alias-twitter-content-blocker\" data-borlabs-cookie-content=\"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\">\n<div class=\"brlbs-cmpnt-cb-preset-b brlbs-cmpnt-cb-x\">\n<div class=\"brlbs-cmpnt-cb-thumbnail\" style=\"background-image: url('https:\/\/www.coinpro.ch\/wp-content\/uploads\/borlabs-cookie\/1\/cb-twitter-main.png')\"><\/div>\n<div class=\"brlbs-cmpnt-cb-main\">\n<div class=\"brlbs-cmpnt-cb-content\">\n<p class=\"brlbs-cmpnt-cb-description\">You are currently seeing a placeholder content of <strong>X<\/strong>. To access the actual content, click on the button below. Please note that data will be passed on to third-party providers.<\/p>\n<p> <a class=\"brlbs-cmpnt-cb-provider-toggle\" href=\"#\" data-borlabs-cookie-show-provider-information role=\"button\">More information<\/a> <\/div>\n<div class=\"brlbs-cmpnt-cb-buttons\"> <a class=\"brlbs-cmpnt-cb-btn\" href=\"#\" data-borlabs-cookie-unblock role=\"button\">Unlock content<\/a> <a class=\"brlbs-cmpnt-cb-btn\" href=\"#\" data-borlabs-cookie-accept-service role=\"button\" style=\"display: inherit\">Accept required service and unblock content<\/a> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/div>\n<p>Buy <a href=\"https:\/\/www.coinpro.ch\/en\/buy\/where-to-buy-and-trade-cardano-best-providers-and-tips\/\">Cardano now<\/a>!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cardano was the target of a deliberate attack \u2013 founder Charles Hoskinson announced last Friday. Within a few hours, developers had managed to fend off the attack. In the meantime, however, a chain split occurred, causing damage of unknown extent. Investigations against the attacker are reportedly already underway. Cardano Chain Split Makes Waves: What Happened&#8230;<\/p>\n","protected":false},"author":19,"featured_media":41031,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[17325,17318],"tags":[17408,17422,17594,17458,17536,17644],"class_list":["post-41030","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news-en","category-recommendations","tag-blockchain-en","tag-cardano-en","tag-cryptocurrencies","tag-defi-en","tag-hack-en","tag-news-en"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Cardano Chain Split Makes Waves: What Happened - CoinPro.ch<\/title>\n<meta name=\"description\" content=\"A Cardano Chain Split is causing a stir. 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