{"id":732596,"date":"2026-06-10T18:45:17","date_gmt":"2026-06-10T15:45:17","guid":{"rendered":"https:\/\/buradabiliyorum.com\/en\/cybersecurity-researchers-arent-happy-about-the-guardrails-on-anthropics-fable\/"},"modified":"2026-06-10T18:45:17","modified_gmt":"2026-06-10T15:45:17","slug":"cybersecurity-researchers-arent-happy-about-the-guardrails-on-anthropics-fable","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/cybersecurity-researchers-arent-happy-about-the-guardrails-on-anthropics-fable\/","title":{"rendered":"Cybersecurity researchers aren&#8217;t happy about the guardrails on Anthropic&#8217;s Fable"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6a40e05bbbf55\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #dd3333;color:#dd3333\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #dd3333;color:#dd3333\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a40e05bbbf55\" checked aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/buradabiliyorum.com\/en\/cybersecurity-researchers-arent-happy-about-the-guardrails-on-anthropics-fable\/#Contact_Us\" >Contact Us<\/a><\/li><\/ul><\/nav><\/div>\n<div>\n<p id=\"speakable-summary\" class=\"wp-block-paragraph\">Anthropic released its latest model Fable on Tuesday, billing it as a public and limited version of its powerful and much-hyped cybersecurity model Mythos.<\/p>\n<p class=\"wp-block-paragraph\">But not everyone is h<a href=\"https:\/\/buradabiliyorum.com\/en\/category\/download-scripts-themes-apps\/\" data-internallinksmanager029f6b8e52c=\"9\" title=\"Download Scripts &amp; Themes &amp; Apps\" target=\"_blank\" rel=\"noopener\">app<\/a>y with the restrictions, and <a rel=\"nofollow\" target=\"_blank\" rel=\"nofollow\" href=\"https:\/\/x.com\/Behi_Sec\">a number<\/a> of <a rel=\"nofollow\" target=\"_blank\" rel=\"nofollow\" href=\"https:\/\/x.com\/zeroxjf\/status\/2064400152178389307\">cybersecurity<\/a> <a rel=\"nofollow\" target=\"_blank\" rel=\"nofollow\" href=\"https:\/\/x.com\/alexjplaskett\/status\/2064594731137409128\">researchers<\/a> and <a rel=\"nofollow\" target=\"_blank\" rel=\"nofollow\" href=\"https:\/\/x.com\/mehulmpt\/status\/2064449391969374238\">professionals<\/a> <a rel=\"nofollow\" target=\"_blank\" rel=\"nofollow\" href=\"https:\/\/www.reddit.com\/r\/ClaudeCode\/comments\/1u1rvn3\/fable_refusing_every_request_related_to\/\">have aired<\/a> <a rel=\"nofollow\" target=\"_blank\" rel=\"nofollow\" href=\"https:\/\/www.reddit.com\/r\/ClaudeAI\/comments\/1u1o50u\/had_fable_5_run_an_indepth_cybersecurity_audit_of\/\">complaints<\/a> online.\u00a0<\/p>\n<p class=\"wp-block-paragraph\">\u201c[Fable] rejects any request that could be tangentially cyber related. Even innocuous tasks like reading a blog post,\u201d <a rel=\"nofollow\" target=\"_blank\" rel=\"nofollow\" href=\"https:\/\/x.com\/chompie1337\/status\/2064431038554939507\">said<\/a> Valentina \u201cChompie\u201d Palmiotti, a well-known security researcher who works at IBM X-Force.\u00a0<\/p>\n<p class=\"wp-block-paragraph\">When a prompt triggers its guardrails, Fable pauses the chat and says that its \u201csafety measures flagged this message for cybersecurity or biology topics.\u201d<\/p>\n<p class=\"wp-block-paragraph\">The guardrails were put in place to limit the risk that Fable could be used to develop malware or compromise software \u2014 <a rel=\"nofollow\" target=\"_blank\" rel=\"nofollow\" href=\"https:\/\/www.anthropic.com\/news\/AI-enabled-cyber-threats-mitre-attack\">a longstanding concern<\/a> within Anthropic. The restrictions on biology come from a similar concern around <a rel=\"nofollow\" target=\"_blank\" rel=\"nofollow\" href=\"https:\/\/red.anthropic.com\/2025\/biorisk\/\">developing biological weapons<\/a>.<\/p>\n<p class=\"wp-block-paragraph\">When the AI giant released Mythos in April, it restricted the model to a limited number of companies and organizations in what it called Project Glasswing, an effort to deploy the model to secure critical software and infrastructure. Last week, Anthropic expanded access to Mythos to hundreds of organizations in 15 countries.\u00a0<\/p>\n<p class=\"wp-block-paragraph\">But despite the good intentions, many cybersecurity experts are still put off by the haphazard nature of the restrictions. Matt Suiche, a cybersecurity veteran, told TechCrunch that \u201cif you ask it to write secure code, it assumes it is cybersecurity related work instead of software engineering best practices, and you get downgraded.\u201d Fable is programmed to fall back to Claude Opus 4.8 if it hits a guardrail. \u201cIt seems to be keyword based, so anything in the lexical field of \u2018cybersecurity\u2019 triggers the guardrails.\u201d<\/p>\n<div class=\"article-block block--callout block--right has-green-500-background-color\">\n<h4 class=\"block--callout__title\"><span class=\"ez-toc-section\" id=\"Contact_Us\"><\/span>Contact Us<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\t\t\tDo you have more information about how hackers are using AI? Or how cybersecuity companies are using AI? We\u2019d love to hear from you. From a non-work device and network, you can contact Lorenzo Franceschi-Bicchierai securely on Signal at +1 917 257 1382, or via Telegram and Keybase @lorenzofb, or email.\t\t<\/p><\/div>\n<p class=\"wp-block-paragraph\">\u201cBut it is understandable as we are still in the early days and they are still adapting their guardrails. I am sure they are going to evolve over time as Anthropic and other frontier model companies will collaborate more with the current new generation of cybersecurity companies,\u201d said Suiche, who is a member of the technical staff at Tolmo, an AI cybersecurity startup. \u201cIt\u2019s better to catch more people than not enough when you do such a release and to relax the guardrails over time.\u201d<\/p>\n<p class=\"wp-block-paragraph\">Another researcher <a rel=\"nofollow\" target=\"_blank\" rel=\"nofollow\" href=\"https:\/\/x.com\/evilsocket\/status\/2064694653765451925\">griped<\/a> on X that \u201ceven asking for a code review\u201d triggers Fable\u2019s guardrails.\u00a0<\/p>\n<p class=\"wp-block-paragraph\">Anthropic did not im<a href=\"https:\/\/buradabiliyorum.com\/en\/category\/social-mediaa\/\" data-internallinksmanager029f6b8e52c=\"1\" title=\"Social Media\" target=\"_blank\" rel=\"noopener\">media<\/a>tely respond to a request for comment.<\/p>\n<p class=\"wp-block-paragraph\">Apart from guardrails inside its models, Anthropic requires cybersecurity professionals to apply to the <a rel=\"nofollow\" target=\"_blank\" rel=\"nofollow\" href=\"https:\/\/support.claude.com\/en\/articles\/14604842-real-time-cyber-safeguards-on-claude#:~:text=Program%20described%20below.-,Cyber%20Verification%20Program,-Many%20cybersecurity%20practitioners\">Cyber Verification Program<\/a>. If they get approved, the applicants have fewer limitations on using Claude for cybersecurity work. OpenAI has a similar program called <a rel=\"nofollow\" target=\"_blank\" rel=\"nofollow\" href=\"https:\/\/chatgpt.com\/cyber\">Trusted Access for Cyber<\/a>.<\/p>\n<\/div>\n<p><em>When you purchase through links in our articles, we may earn a small commission. This doesn\u2019t affect our editorial independence.<\/em><\/p>\n<blockquote><p><strong><span style=\"color: #ff6600;\">If you liked the article, do not forget to share it with your friends. Follow us on\u00a0<span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/news.google.com\/publications\/CAAqBwgKMN63nwsw68G3Aw\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">Google News<\/a><\/span>\u00a0too, click on the star and choose us from your favorites.<\/span><\/strong><\/p><\/blockquote>\n<blockquote>\n<p style=\"text-align: center;\"><strong>If you want to read more like this article, you can visit our <span style=\"color: #ff9900;\"><a style=\"color: #ff9900;\" href=\"https:\/\/buradabiliyorum.com\/en\/category\/technology\/\" target=\"_blank\" >Technology<\/a><\/span> category.<\/strong><\/p>\n<\/blockquote>\n<p><span style=\"color: black;\"><a style=\"color: #ff9900;\" href=\"https:\/\/techcrunch.com\/2026\/06\/10\/cybersecurity-researchers-arent-happy-about-the-guardrails-on-anthropics-fable\/\" target=\"_blank\" >Source<\/a><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Anthropic released its latest model Fable on Tuesday, billing it as a public and limited version of its powerful and much-hyped cybersecurity model Mythos. But not everyone is happy with the restrictions, and a number of cybersecurity researchers and professionals have aired complaints online.\u00a0 \u201c[Fable] rejects any request that could be tangentially cyber related. Even&#8230;<\/p>\n","protected":false},"author":1,"featured_media":732597,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"https:\/\/techcrunch.com\/wp-content\/uploads\/2026\/06\/anthropic-claude-fable.jpg?resize=1200,798","fifu_image_alt":"","footnotes":""},"categories":[18],"tags":[77337,152633,152300,70375,162568,161494,72287],"class_list":["post-732596","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technology","tag-ai","tag-ai-safety","tag-anthropic","tag-cybersecurity","tag-fable","tag-mythos","tag-security"],"_links":{"self":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/732596","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/comments?post=732596"}],"version-history":[{"count":0,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/732596\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media\/732597"}],"wp:attachment":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media?parent=732596"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/categories?post=732596"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/tags?post=732596"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}