{"id":123083,"date":"2026-04-17T07:29:58","date_gmt":"2026-04-17T07:29:58","guid":{"rendered":"https:\/\/mailinvest.blog\/index.php\/2026\/04\/17\/claude-opus-wrote-a-chrome-exploit-for-2283-the-register\/"},"modified":"2026-04-17T07:30:59","modified_gmt":"2026-04-17T07:30:59","slug":"claude-opus-wrote-a-chrome-exploit-for-2283-the-register","status":"publish","type":"post","link":"https:\/\/mailinvest.blog\/index.php\/2026\/04\/17\/claude-opus-wrote-a-chrome-exploit-for-2283-the-register\/","title":{"rendered":"Claude Opus wrote a Chrome exploit for $2,283 \u2022 The Register"},"content":{"rendered":"<p> <a href=\"https:\/\/go.fiverr.com\/visit\/?bta=1052423&nci=17043\" Target=\"_Top\"><img loading=\"lazy\" decoding=\"async\" border=\"0\" src=\"https:\/\/mailinvest.blog\/wp-content\/themes\/breek\/assets\/images\/transparent.gif\" data-lazy=\"true\" data-src=\"https:\/\/fiverr.ck-cdn.com\/tn\/serve\/?cid=40081059\"  width=\"601\" height=\"201\"><\/a>\n<\/p>\n<div id=\"body\">\n<p>Anthropic withheld its <a target=\"_blank\" href=\"https:\/\/www.theregister.com\/2026\/04\/07\/anthropic_all_your_zerodays_are_belong_to_us\/\">Mythos<\/a> bug-finding mannequin from public launch on account of issues that it might allow attackers to seek out and exploit vulnerabilities earlier than anybody might react.<\/p>\n<p>However the firm&#8217;s Opus 4.6 mannequin, already outmoded by the <a href=\"https:\/\/www.anthropic.com\/news\/claude-opus-4-7\" rel=\"nofollow\">release of Opus 4.7<\/a> on Thursday, is able to creating purposeful exploit code.<\/p>\n<p>In a <a href=\"https:\/\/www.hacktron.ai\/blog\/i-let-claude-opus-to-write-me-a-chrome-exploit\" rel=\"nofollow\">blog post<\/a> on Wednesday, Mohan Pedhapati (s1r1us), CTO of Hacktron, described how he used Opus 4.6 to create a full exploit chain focusing on the V8 JavaScript engine in Chrome 138, which is bundled into present variations of Discord.<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"top\" data-raptor=\"condor\" data-xsm=\",fluid,mpu,dmpu,\" data-sm=\",fluid,mpu,dmpu,\" data-md=\",fluid,mpu,dmpu,\">\n        <noscript><br \/>\n            <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=2&amp;c=2aeHhdsKcm2ngoCxtez23zQAAAVE&amp;t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0\" target=\"_blank\"><br \/>\n                <img decoding=\"async\" src=\"https:\/\/mailinvest.blog\/wp-content\/themes\/breek\/assets\/images\/transparent.gif\" data-lazy=\"true\" data-src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=2&amp;c=2aeHhdsKcm2ngoCxtez23zQAAAVE&amp;t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0\" alt=\"\"\/><br \/>\n            <\/a><br \/>\n        <\/noscript>\n    <\/div>\n<p>&#8220;The <a href=\"https:\/\/access.redhat.com\/security\/cve\/cve-2026-5873\" rel=\"nofollow\">V8 [out of bounds error]<\/a> we used was from Chrome 146, the identical model Anthropic&#8217;s personal Claude Desktop is operating,&#8221; he mentioned. &#8220;Per week of backwards and forwards, 2.3 billion tokens, $2,283 in API prices, and about ~20 hours of me unsticking it from useless ends. It popped calc.&#8221;<\/p>\n<blockquote class=\"pullquote\">\n<p>Finally, any script kiddie with sufficient persistence and an API key will be capable to pop shells<\/p>\n<\/blockquote>\n<p>\u201cPopped calc\u201d is a reference to opening the calculator app \u2013 an occasion generally utilized in proof-of-concept exploit code to point that an assault compromised the goal system.<\/p>\n<p>Pedhapati mentioned that whereas $2,283 is a big sum for a person to pay, it is little or no for those who think about the weeks it might take an individual to develop an analogous exploit with out help. Even for those who added a number of {dollars} thousand for Pedhapati&#8217;s time tending the mannequin, that is nonetheless considerably much less the theoretical reward (~$15,000) one may get from Google&#8217;s and Discord&#8217;s vulnerability reward packages. And that is simply the official market \u2013 who is aware of what criminals may pay for a sizzling 0-day?.<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"top\" data-raptor=\"falcon\" data-xmd=\",fluid,mpu,leaderboard,\" data-lg=\",fluid,mpu,leaderboard,\" data-xlg=\",fluid,billboard,superleaderboard,mpu,leaderboard,\" data-xxlg=\",fluid,billboard,superleaderboard,brandwidth,brandimpact,leaderboard,mpu,\">\n            <noscript><br \/>\n                <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44aeHhdsKcm2ngoCxtez23zQAAAVE&amp;t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" target=\"_blank\"><br \/>\n                    <img decoding=\"async\" src=\"https:\/\/mailinvest.blog\/wp-content\/themes\/breek\/assets\/images\/transparent.gif\" data-lazy=\"true\" data-src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44aeHhdsKcm2ngoCxtez23zQAAAVE&amp;t=ct%3Dns%26unitnum%3D426raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" alt=\"\"\/><br \/>\n                <\/a><br \/>\n            <\/noscript>\n        <\/div>\n<div class=\"adun_eagle_desktop_story_wrapper\">\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"mid\" data-raptor=\"eagle\" data-xxlg=\",mpu,dmpu,\">\n                <noscript><br \/>\n                    <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33aeHhdsKcm2ngoCxtez23zQAAAVE&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" target=\"_blank\"><br \/>\n                        <img decoding=\"async\" src=\"https:\/\/mailinvest.blog\/wp-content\/themes\/breek\/assets\/images\/transparent.gif\" data-lazy=\"true\" data-src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33aeHhdsKcm2ngoCxtez23zQAAAVE&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" alt=\"\"\/><br \/>\n                    <\/a><br \/>\n                <\/noscript>\n            <\/div>\n<\/p><\/div>\n<p>In accordance with the Opus 4.7 System Card, &#8220;Opus 4.7 is roughly much like Opus 4.6 in cyber capabilities.&#8221; Nevertheless it&#8217;s apparently much less succesful than Mythos Preview and comes with &#8220;safeguards that mechanically detect and block requests that point out prohibited or high-risk cybersecurity makes use of.&#8221;<\/p>\n<p>However for Pedhapati, the particular mannequin is not the difficulty. Somewhat, it is ongoing enhancements in code technology that demand a change of safety posture and process.<\/p>\n<p>&#8220;Whether or not Mythos is overhyped or not does not matter,&#8221; mentioned Pedhapati. &#8220;The curve is not flattening. If not Mythos, then the following model, or the one after that. Finally, any script kiddie with sufficient persistence and an API key will be capable to pop shells on unpatched software program. It is a query of when, not if.&#8221;<\/p>\n<p>For <a href=\"https:\/\/www.electronjs.org\/apps\" rel=\"nofollow\">apps<\/a> based mostly on the Chrome-based Electron framework (e.g. Slack, Discord, and so forth.) the query is when will they replace their codebase to the most recent model, which continues to be behind the most recent Google Chrome launch.<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"top\" data-raptor=\"falcon\" data-xsm=\",fluid,mpu,dmpu,\" data-sm=\",fluid,mpu,dmpu,\" data-md=\",fluid,mpu,dmpu,\">\n            <noscript><br \/>\n                <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44aeHhdsKcm2ngoCxtez23zQAAAVE&amp;t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" target=\"_blank\"><br \/>\n                    <img decoding=\"async\" src=\"https:\/\/mailinvest.blog\/wp-content\/themes\/breek\/assets\/images\/transparent.gif\" data-lazy=\"true\" data-src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44aeHhdsKcm2ngoCxtez23zQAAAVE&amp;t=ct%3Dns%26unitnum%3D426raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" alt=\"\"\/><br \/>\n                <\/a><br \/>\n            <\/noscript>\n        <\/div>\n<p>Electron <a href=\"https:\/\/releases.electronjs.org\/release\/v41.2.1\" rel=\"nofollow\">41.2.1<\/a>, launched on April 15, bundles Chrome 146.0.7680.188, only one model behind the desktop Google Chrome model (<a href=\"https:\/\/chromereleases.googleblog.com\/2026\/04\/stable-channel-update-for-desktop_15.html\" rel=\"nofollow\">147.0.7727.101\/102<\/a>) launched that day. However builders of Electron apps do not essentially replace their dependencies and situation new variations instantly. And customers do not essentially get these updates instantly.<\/p>\n<p>Pedhapati mentioned he picked Discord as a goal as a result of &#8220;It is sitting on Chrome 138, 9 main variations behind present.&#8221;<\/p>\n<p>Pedhapati argues that as AI fashions grow to be extra able to exploit growth, the patch window will get smaller.<\/p>\n<div aria-hidden=\"true\" class=\"adun\" id=\"story_eagle_xsm_sm_md_xmd_lg_xlg\" data-pos=\"mid\" data-raptor=\"eagle\" data-xsm=\",mpu,dmpu,\" data-sm=\",mpu,dmpu,\" data-md=\",mpu,dmpu,\" data-xmd=\",mpu,dmpu,\" data-lg=\",mpu,dmpu,\" data-xlg=\",mpu,dmpu,\">\n            <noscript><br \/>\n                <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33aeHhdsKcm2ngoCxtez23zQAAAVE&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" target=\"_blank\"><br \/>\n                    <img decoding=\"async\" src=\"https:\/\/mailinvest.blog\/wp-content\/themes\/breek\/assets\/images\/transparent.gif\" data-lazy=\"true\" data-src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33aeHhdsKcm2ngoCxtez23zQAAAVE&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" alt=\"\"\/><br \/>\n                <\/a><br \/>\n            <\/noscript>\n        <\/div>\n<p>&#8220;Each patch is mainly an exploit trace,&#8221; he argues, including that this might be significantly troublesome for open supply tasks, as a result of fixes typically grow to be publicly seen in code earlier than the revised model will get launched.<\/p>\n<p>His recommendation to builders is to focus extra on safety earlier than code will get pushed and to pay nearer consideration to dependencies, so modifications might be made shortly. He additionally argues that safety patches ought to be accomplished mechanically, so individuals aren&#8217;t left susceptible as a result of they forgot to simply accept an replace. And he says open supply tasks like V8 use extra warning by way of when the general public vulnerability particulars.<\/p>\n<p>&#8220;Each public commit is a beginning gun for anybody with an API key and powerful workforce members who can weaponize exploits,&#8221; he mentioned. \u00ae<\/p>\n<\/p><\/div>\n<iframe data-lazy=\"true\" data-src=\"https:\/\/www.fiverr.com\/gig_widgets?id=U2FsdGVkX18x7XQvttUTrv1oEqmGNGTgvvCUiUoJ\/AP4z\/UyMz8lXGOLpu15jIMxBbTR0gmD5uBoFvhC4KWeALQRp3h\/X\/AwcVD0K8Wj9H\/ZzYKzcCNHosB9oS4SCJJFWiN85P9ICAc4OgCoE\/wHKIY7CDkf2\/DQ1vqGvk4smVe5cRDEmrLPCWi4FC8p40VUhSmWQ5udCm0zoJtorgWv3vbDQw0kKYkwn39ozAnQXDe+YvWMxkLFWA+O3TFwkJvdkIK+\/AUSnRssPKt5WHY0FhNOxnSPcLslEL4G4\/RfP95ve99U+kRnDy3X+KtzdQLY+u935ghON\/o3UE4IMv9oN6JX9RnxzL\/LRcOgnHigxStSGPKsZYtnz8RWNVT\/rOLAibqiWJadC5MYHRbekF3eg6FOGrQGkXYbsn0+a5aovnlLCbLwIqY9fcS17UX8J235iQ6cdmHNbrPeS84CMm34RA==&affiliate_id=1052423&strip_google_tagmanager=true\" loading=\"lazy\" data-with-title=\"true\" class=\"fiverr_nga_frame\" frameborder=\"0\" height=\"350\" width=\"100%\" referrerpolicy=\"no-referrer-when-downgrade\" data-mode=\"random_gigs\" onload=\" var frame = this; var script = document.createElement('script'); script.addEventListener('load', function() { window.FW_SDK.register(frame); }); script.setAttribute('src', 'https:\/\/www.fiverr.com\/gig_widgets\/sdk'); document.body.appendChild(script); \" ><\/iframe>\n<br \/><a href=\"https:\/\/go.theregister.com\/feed\/www.theregister.com\/2026\/04\/17\/claude_opus_wrote_chrome_exploit\/\">Source link <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Anthropic withheld its Mythos bug-finding mannequin from public launch on account of issues that it might allow attackers to seek out and exploit vulnerabilities earlier&#8230;<\/p>\n","protected":false},"author":1,"featured_media":123084,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-123083","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tech-universe"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Claude Opus wrote a Chrome exploit for $2,283 \u2022 The Register - mailinvest.blog<\/title>\n<meta name=\"description\" content=\"Technology is forever changing, and there are always new pieces of technology to replace obsolete ones. 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