{"id":1896087,"date":"2026-04-22T09:10:17","date_gmt":"2026-04-22T06:10:17","guid":{"rendered":"https:\/\/analyse.optim.biz\/?p=1896087"},"modified":"2026-04-22T09:10:17","modified_gmt":"2026-04-22T06:10:17","slug":"anthropic-is-investigating-unauthorized-access-of-its-mythos-cybersecurity-tool","status":"publish","type":"post","link":"https:\/\/analyse.optim.biz\/?p=1896087","title":{"rendered":"Anthropic is investigating &#8216;unauthorized access&#8217; of its Mythos cybersecurity tool"},"content":{"rendered":"<p>[analyse_image type=&#8221;featured&#8221; src=&#8221;https:\/\/s.yimg.com\/ny\/api\/res\/1.2\/kROshQoZY.x5Y8pYb4YwYQ&#8211;\/YXBwaWQ9aGlnaGxhbmRlcjt3PTEyMDA7aD03OTg-\/https:\/\/s.yimg.com\/os\/creatr-uploaded-images\/2026-04\/ce628c30-347c-11f1-bffe-6e1407159fb2&#8243;]<\/p>\n<article id=\"article-7065c4e5-02aa-48b6-b58f-f5dfd628c886\">\n<div>\n<div class=\"mx-auto md:px-10 md:max-w-[1220px]\">\n<nav class=\"prestige-breadcrumb relative mx-4 md:mx-0\" aria-label=\"breadcrumbs\">\n<ol class=\"no-scrollbar overflow-scroll whitespace-nowrap text-battleship\">\n<li class=\"inline\">\n<li class=\"inline-block cursor-default last:pr-10 md:last:pr-20 font-bold\">AI<\/li>\n<\/ol>\n<\/nav>\n<header class=\"mb-4 px-4 md:mb-6 md:px-0\">\n<h1 class=\"layout-h1 my-2 font-bold leading-tight\">Anthropic is investigating &#8216;unauthorized access&#8217; of its Mythos cybersecurity tool<\/h1>\n<h2 class=\"my-2 text-[18px] font-light leading-5 md:max-w-[660px] md:text-[20px]\/[28px]\">Mythos can find security vulnerabilities &#8216;in every major operating operating system and web browser,&#8217; the company has said.<\/h2>\n<div class=\"flex-col items-start lg:flex lg:flex-row lg:items-center lg:justify-between mt-6\">\n<div class=\"relative md:mr-[10px]\">\n<div class=\"flex items-center\">\n<div class=\"flex mr-2\">\n<div class=\"shrink-0 cursor-pointer inline-block size-[42px] lg:size-[48px]\"><img decoding=\"async\" alt role=\"img\" loading=\"lazy\" class=\"size-full rounded-full object-cover object-center shadow-[0_0_0_2px_#ffffff]\" src=\"https:\/\/s.yimg.com\/ny\/api\/res\/1.2\/jTvwq.9dDCrzQ8wsoTeXCQ--\/YXBwaWQ9aGlnaGxhbmRlcjt3PTgwO2g9ODA-\/https:\/\/s.yimg.com\/os\/creatr-uploaded-images\/2024-02\/500d6260-d592-11ee-befa-a7ddcfcafe0d\"><\/div>\n<\/div>\n<div class=\"inline-block\">\n<div class=\"w-max text-sm\/5 font-semibold lg:!flex flex items-center\">\n<div class=\"flex flex-col\">\n<div class=\"flex w-max items-center\">Steve Dent<\/div>\n<p><span class=\"font-normal sm:before:inline-block\">Reporter<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"lg:hidden\">\n<div class=\"text-xs text-dolphin dark:text-shark md:text-sm\/5 pt-4\">\n<div class=\"inline-block\"><time datetime=\"2026-04-22T09:10:17.000Z\">Wed, April 22, 2026 at 9:10 AM UTC<\/time><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"ml-0 mt-4 flex items-center lg:ml-3 lg:mt-0\">\n<div class=\"ml-0 mr-2\">\n<div class=\"relative flex\">Add Engadget on Google<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"hidden lg:block\">\n<div class=\"text-xs text-dolphin dark:text-shark md:text-sm\/5 pt-4\">\n<div class=\"inline-block\"><time datetime=\"2026-04-22T09:10:17.000Z\">Wed, April 22, 2026 at 9:10 AM UTC<\/time><\/div>\n<\/div>\n<\/div>\n<\/header>\n<\/div>\n<div class=\"grid grid-cols-1 gap-x-8 lg:gap-x-0 mx-auto md:px-10 md:max-w-[1220px] md:grid-cols-[[main-start]_1fr_[main-end_right-start]_min-content_[right-end]] lg:!gap-x-8\">\n<div class=\"md:col-main\" data-i13n-boundary=\"true\">\n<div>\n<div>\n<div class=\"grid grid-cols-[[fullbleed-start_body-start]_minmax(auto,750px)_[body-end_fullbleed-end]]\">\n<figure class=\"relative col-body mb-4\">\n<div class=\"relative overflow-hidden fig-image-round left-1\/2 w-screen -translate-x-1\/2 md:left-0 md:w-auto md:translate-x-0\"><img decoding=\"async\" alt class=\"object-cover object-center\" src=\"https:\/\/s.yimg.com\/ny\/api\/res\/1.2\/nG41jki08vtbktQ0BaxXuw--\/YXBwaWQ9aGlnaGxhbmRlcjt3PTEyNDI7aD04MjY-\/https:\/\/s.yimg.com\/os\/creatr-uploaded-images\/2026-04\/ce628c30-347c-11f1-bffe-6e1407159fb2\"><\/div><figcaption class=\"relative text-[0.875rem]\/[1.25rem] figure-caption mt-1 line-clamp-2 mt-2.5 md:mt-2 pr-2.5\">\n<div><span>NurPhoto via Getty Images<\/span><\/div>\n<\/figcaption><\/figure>\n<\/div>\n<\/div>\n<div class=\"grid grid-cols-article-mobile md:grid-cols-article lg:max-w-[750px] drop-cap\" data-article-body=\"true\">\n<p class=\"col-body mb-4 leading-7 text-[18px] md:leading-8 break-words min-w-0 charcoal-color\">Anthropic is investigating potential &#8220;unauthorized access&#8221; to its Claude Mythos model that has been touted for its ability to find cybersecurity flaws, the company told <em>Bloomberg<\/em>. A group gained access to the model through a third-party contractor portal and by using internet sleuthing tools, according to the report. However, the group is only interested in trying the models and not using them maliciously, according to a person familiar with the matter.<\/p>\n<p class=\"col-body mb-4 leading-7 text-[18px] md:leading-8 break-words min-w-0 charcoal-color\">&#8220;We&#8217;re investigating a report claiming unauthorized access to Claude Mythos Previous through one of our third-party vendor environments,&#8221; Anthropic said in a statement.<\/p>\n<p class=\"col-body mb-4 leading-7 text-[18px] md:leading-8 break-words min-w-0 charcoal-color\">The Claude Mythos Preview arrived earlier this month as part of &#8220;Project Glasswing&#8221; with significant fanfare. Anthropic limited the preview release to a small number of trusted test companies including Amazon, Microsoft, Apple and Cisco. Another was Mozilla, which said the model helped it find and patch 271 Firefox vulnerabilities. A growing number of banks and government agencies have been seeking access as well in order to safeguard their own systems.<\/p>\n<div class=\"col-fullbleed mb-4 bg-marshmallow pb-5 dark:bg-ramones md:invisible md:mb-0 md:h-0 md:overflow-hidden md:pb-0\">\n<div class=\"py-2 text-center text-xs uppercase\">Advertisement<\/div>\n<div class=\"flex w-full flex-nowrap justify-center\">\n<div class=\"flex\" id=\"_R_lh9nam95feiv5tilbH1_\">\n<div class=\"flex size-full items-center justify-center bg-marshmallow text-center leading-3\">Advertisement<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"col-body mb-4 hidden pb-5 dark:bg-ramones md:block\">\n<div class=\"flex w-full flex-nowrap justify-center\">\n<div class=\"flex\" id=\"_R_15h9nam95feiv5tilbH1_\">\n<div class=\"flex size-full items-center justify-center bg-marshmallow text-center leading-3\">Advertisement<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p class=\"col-body mb-4 leading-7 text-[18px] md:leading-8 break-words min-w-0 charcoal-color\">However, several unauthorized users (who reportedly have a private chat on Discord), supposedly gained access to Mythos through a developer portal and by making an educated guess as to where the model might be located. That same group may also have access to other unreleased Anthropic models, according to the report.<\/p>\n<p class=\"col-body mb-4 leading-7 text-[18px] md:leading-8 break-words min-w-0 charcoal-color\">The new Mythos model has gained notoriety of late for its supposed ability to sniff out security flaws in operating systems and internet browsers. This has prompted some skepticism among security researchers but also fear that AI-generated cyber attacks could become a &#8220;real threat,&#8221; CTO of cloud security firm Edera Alex Zenla recently told <em>Wired<\/em>. Anthropic was recently designated as a &#8220;supply chain risk&#8221; by the US Department of Defense, but has been in talks with the Trump administration of late to have that label removed.<\/p>\n<\/div>\n<div class=\"grid grid-cols-article-mobile md:grid-cols-article lg:max-w-[750px]\">\n<div class=\"commerce col-body\" data-pw=\"disclosure\">\n<div class=\"mb-7 flex items-center rounded-lg p-3 p-5 w-fit flex-col md:flex-row\">\n<p class=\"text-[12px] text-battleship dark:text-gandalf md:text-[13px]\">If you buy something through a link in this article, we may earn commission.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"md:col-main grid grid-cols-article-mobile md:grid-cols-article lg:max-w-[750px]\">\n<div class=\"no-scrollbar col-body mx-4 mb-8 mt-2.5 overflow-x-scroll whitespace-nowrap md:mx-0 md:max-w-[750px] md:overflow-x-visible md:hidden\">\n<div class=\"mx-auto max-w-screen-sm\">\n<ul class=\"inline-flex text-xs md:text-sm\">\n<li class=\"mr-6\">About our ads<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<div class=\"grid grid-cols-article-mobile md:grid-cols-article lg:max-w-[750px] drop-cap\" data-article-body=\"true\">\n<p class=\"col-body mb-4 leading-7 text-[18px] md:leading-8 break-words min-w-0 charcoal-color\">Anthropic is investigating potential &#8220;unauthorized access&#8221; to its Claude Mythos model that has been touted for its ability to find cybersecurity flaws, the company told <em>Bloomberg<\/em>. A group gained access to the model through a third-party contractor portal and by using internet sleuthing tools, according to the report. However, the group is only interested in trying the models and not using them maliciously, according to a person familiar with the matter.<\/p>\n<p class=\"col-body mb-4 leading-7 text-[18px] md:leading-8 break-words min-w-0 charcoal-color\">&#8220;We&#8217;re investigating a report claiming unauthorized access to Claude Mythos Previous through one of our third-party vendor environments,&#8221; Anthropic said in a statement.<\/p>\n<p class=\"col-body mb-4 leading-7 text-[18px] md:leading-8 break-words min-w-0 charcoal-color\">The Claude Mythos Preview arrived earlier this month as part of &#8220;Project Glasswing&#8221; with significant fanfare. Anthropic limited the preview release to a small number of trusted test companies including Amazon, Microsoft, Apple and Cisco. Another was Mozilla, which said the model helped it find and patch 271 Firefox vulnerabilities. A growing number of banks and government agencies have been seeking access as well in order to safeguard their own systems.<\/p>\n<div class=\"col-fullbleed mb-4 bg-marshmallow pb-5 dark:bg-ramones md:invisible md:mb-0 md:h-0 md:overflow-hidden md:pb-0\">\n<div class=\"py-2 text-center text-xs uppercase\">Advertisement<\/div>\n<div class=\"flex w-full flex-nowrap justify-center\">\n<div class=\"flex\" id=\"_R_lh9nam95feiv5tilbH1_\">\n<div class=\"flex size-full items-center justify-center bg-marshmallow text-center leading-3\">Advertisement<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"col-body mb-4 hidden pb-5 dark:bg-ramones md:block\">\n<div class=\"flex w-full flex-nowrap justify-center\">\n<div class=\"flex\" id=\"_R_15h9nam95feiv5tilbH1_\">\n<div class=\"flex size-full items-center justify-center bg-marshmallow text-center leading-3\">Advertisement<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p class=\"col-body mb-4 leading-7 text-[18px] md:leading-8 break-words min-w-0 charcoal-color\">However, several unauthorized users (who reportedly have a private chat on Discord), supposedly gained access to Mythos through a developer portal and by making an educated guess as to where the model might be located. That same group may also have access to other unreleased Anthropic models, according to the report.<\/p>\n<p class=\"col-body mb-4 leading-7 text-[18px] md:leading-8 break-words min-w-0 charcoal-color\">The new Mythos model has gained notoriety of late for its supposed ability to sniff out security flaws in operating systems and internet browsers. This has prompted some skepticism among security researchers but also fear that AI-generated cyber attacks could become a &#8220;real threat,&#8221; CTO of cloud security firm Edera Alex Zenla recently told <em>Wired<\/em>. Anthropic was recently designated as a &#8220;supply chain risk&#8221; by the US Department of Defense, but has been in talks with the Trump administration of late to have that label removed.<\/p>\n<\/div>\n<p>[analyse_source url=&#8221;https:\/\/www.engadget.com\/ai\/anthropic-is-investigating-unauthorized-access-of-its-mythos-cybersecurity-tool-091017168.html&#8221;]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[analyse_image type=&#8221;featured&#8221; src=&#8221;https:\/\/s.yimg.com\/ny\/api\/res\/1.2\/kROshQoZY.x5Y8pYb4YwYQ&#8211;\/YXBwaWQ9aGlnaGxhbmRlcjt3PTEyMDA7aD03OTg-\/https:\/\/s.yimg.com\/os\/creatr-uploaded-images\/2026-04\/ce628c30-347c-11f1-bffe-6e1407159fb2&#8243;] AI Anthropic is investigating &#8216;unauthorized access&#8217; of its Mythos cybersecurity tool Mythos can find security vulnerabilities &#8216;in every major operating operating system and web browser,&#8217; the company has said. Steve Dent Reporter Wed, April 22, 2026 at 9:10 AM UTC Add Engadget on Google Wed, April 22, 2026 at 9:10 AM UTC [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[226,63],"class_list":["post-1896087","post","type-post","status-publish","format-standard","hentry","category-politics","tag-crawlmanager","tag-engadget-com"],"_links":{"self":[{"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=\/wp\/v2\/posts\/1896087","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1896087"}],"version-history":[{"count":0,"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=\/wp\/v2\/posts\/1896087\/revisions"}],"wp:attachment":[{"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1896087"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1896087"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1896087"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}