{"id":60696,"date":"2026-05-20T20:34:15","date_gmt":"2026-05-20T20:34:15","guid":{"rendered":"https:\/\/www.theregister.com\/a\/5243662"},"modified":"2026-05-20T20:34:15","modified_gmt":"2026-05-20T20:34:15","slug":"even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous","status":"publish","type":"post","link":"https:\/\/www.threatshub.org\/blog\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\/","title":{"rendered":"Even Claude agrees: hole in its sandbox was real and dangerous"},"content":{"rendered":"<div><img decoding=\"async\" src=\"https:\/\/image.theregister.com\/224154.jpg?imageId=224154&amp;x=0&amp;y=0&amp;cropw=100&amp;croph=100&amp;panox=0&amp;panoy=0&amp;panow=100&amp;panoh=100&amp;width=1200&amp;height=683\" class=\"ff-og-image-inserted\"><\/div>\n<div data-element-guid=\"d11159dd-82a3-4c53-901c-d41dec75505c\" readability=\"31.97247706422\">\n<p class=\"kicker \">Security<\/p>\n<p class=\"subtitle \">Another day, another AI bug silently fixed with no CVE and no public disclosure<\/p>\n<\/p><\/div>\n<div data-element-guid=\"4c9dc5d9-c886-4348-bf4a-01d0dc71377d\" readability=\"138.49522024367\">\n<p>Two now-patched bypass bugs in Claude Code\u2019s network sandbox put users at risk, and one of these allows baddies to send anything inside the sandbox &#8211; credentials, source code, other private data &#8211; to any server on the internet, according to a researcher who found and reported both flaws to Anthropic.<\/p>\n<p>Aonan Guan, who leads cloud and AI security at Wyze Labs and has hunted down bugs in pretty much every AI system out there, told <span data-lab-italic=\"italic\" class=\"italic m-italic\">The Register<\/span> that this is the second time in five months Anthropic has silently fixed a sandbox bypass vulnerability in Clade Code without issuing a CVE or security advisory specific to the agentic coding tool.&nbsp;<\/p>\n<p>The&nbsp;<a href=\"https:\/\/oddguan.com\/blog\/claude-code-sandbox-2\/README.md\">latest issue<\/a>&nbsp;was a SOCKS5 hostname null-byte injection that can be exploited to trick the sandbox allowlist filter into approving connections it should block. It\u2019s especially dangerous when combined with prompt injection, which Guan previously detailed in his earlier&nbsp;<a href=\"https:\/\/www.theregister.com\/security\/2026\/04\/15\/anthropic-google-microsoft-paid-ai-bug-bounties-quietly\/5221934\">comment and control research<\/a>.&nbsp;<\/p>\n<p>When paired with prompt injection, the new flaw can be abused to force Claude to read hidden instructions and then run attacker-controlled code in the sandbox, allowing miscreants to exfiltrate anything the sandbox could reach. This includes cloud and GitHub credentials, the GitHub token Claude authenticated with, cloud metadata and internal APIs.<\/p>\n<p>\u201cFor anyone who ran Claude Code with a wildcard allowlist on a credential-bearing system, the network boundary did not exist for the 5.5 months from sandbox GA to v2.1.90,\u201d Guan wrote in&nbsp;<a href=\"https:\/\/oddguan.com\/blog\/second-time-same-sandbox-anthropic-claude-code-network-allowlist-bypass-data-exfiltration\/#the-disclosure-experience\">research<\/a>&nbsp;published Wednesday. \u201cTreat that window as a potential exfiltration event.\u201d<\/p>\n<p>Anthropic says it found and fixed the latest flaw before receiving Guan\u2019s report. The fix, according to a spokesperson, is a public commit in the sandbox-runtime repository, which shipped in Claude Code 2.1.88 on March 31. \u201cAnyone can view\u201d the commit, they told us.&nbsp;<\/p>\n<div data-element-guid=\"afe083ca-6701-48e9-9bd8-f8827dd7fb42\" class=\"lab4 column articleList layout_vertical imageLayout_left small-12 large-4 small-abs-12 large-abs-4 abs_grid_4 desktop-floatLeft mobile-floatLeft grid-vas-start mobile-grid-vas-start\">\n<div class=\"content border_width_0 border_width_mobile_0 border-radius-48 border-radius-mobile_48\">\n<h2 class=\"article-list-title t19 font-RobotoCondensed\">MORE CONTEXT<\/h2>\n<\/p><\/div>\n<\/div>\n<p>Guan filed his bug bounty report with HackerOne on April 3.&nbsp;<\/p>\n<p>\u201cBecause the report described a vulnerability Anthropic had already caught and patched, it was closed as a duplicate of an internal finding,\u201d the spokesperson said. \u201cWe appreciate the researcher\u2019s time on this report.\u201d<\/p>\n<p>Guan says he doesn\u2019t dispute the timeline. \u201cThat is not the core issue,\u201d he told <span data-lab-italic=\"italic\" class=\"italic m-italic\">The Register<\/span>.&nbsp;<\/p>\n<div data-element-guid=\"ce8512a4-e9b8-45e3-8fb0-2865e8d3e657\" class=\"quotebox column small-12 large-12 small-abs-12 large-abs-12\">\n<div class=\"content\">\n<h3 class=\"quote\"> Shipping a sandbox with a hole is worse than not shipping one. The user with no sandbox knows they have no boundary. The user with a broken sandbox thinks they do. <\/h3>\n<\/p><\/div>\n<\/div>\n<p>\u201cThe core issue is that this was a bypass of a user-configured network sandbox, and there&#8217;s still no advisory CVE, and no changelog note,&#8221; he said. &#8220;Shipping a sandbox with a hole is worse than not shipping one. The user with no sandbox knows they have no boundary. The user with a broken sandbox thinks they do.\u201d<\/p>\n<p>Claude, for its part, seems to side with Guan.&nbsp;<\/p>\n<p>When he showed Claude its own hole, the bot responded \u201cThis is a real bypass of the network sandbox filter,\u201d according to a screenshot published in his research.<\/p>\n<p>The earlier bug, which Guan reported and <a href=\"https:\/\/oddguan.com\/blog\/anthropic-sandbox-cve-2025-66479\/\" rel=\"nofollow\">detailed<\/a> in December 2025, was ultimately assigned a CVE tracker &#8211; <a href=\"https:\/\/nvd.nist.gov\/vuln\/detail\/cve-2025-66479\" rel=\"nofollow\">CVE-2025-66479<\/a> &#8211; and patched in v0.0.16.&nbsp;<\/p>\n<p>But the CVE only applies to Anthropic&#8217;s sandbox-runtime, an upstream package, and not specifically to Claude Code, which Guan says means users have no way to know if their AI coding assistant is reading \u201callow nothing\u201d as \u201callow everything.\u201d He requested a CVE for Claude Code, and Anthropic said no because \u201cThe root cause is in the library.\u201d<\/p>\n<p>Guan told us he\u2019s glad Anthropic ultimately addressed the security holes. But the entire disclosure process illustrates another problem that researchers and <span data-lab-italic=\"italic\" class=\"italic m-italic\">The Reg<\/span> vultures have <a href=\"https:\/\/www.theregister.com\/security\/2026\/04\/16\/mcp-design-flaw-puts-200k-servers-at-risk-researcher\/5222022\">reported<\/a> with how <a href=\"https:\/\/www.theregister.com\/security\/2026\/04\/19\/ai-vendors-response-to-security-flaws-it-wasnt-me\/5228722\">AI vendors often handle vulnerabilities<\/a> in their products: no CVEs issued, and if the flaw is fixed, it usually <a href=\"https:\/\/www.theregister.com\/security\/2026\/01\/20\/anthropic-quietly-fixed-flaws-in-its-git-mcp-server\/4676059\">happens silently<\/a>, with no public advisories. More often than not, the burden of securing AI agents and other systems gets pushed to the end users.&nbsp;<\/p>\n<div data-element-guid=\"5c25f214-751d-4788-b095-12262bd4861c\" class=\"quotebox column small-12 large-12 small-abs-12 large-abs-12\">\n<div class=\"content\">\n<h3 class=\"quote\"> The users need to know the risk is real, and in many cases, they may never know. <\/h3>\n<\/p><\/div>\n<\/div>\n<p>\u201cSome vendors issue CVEs and some do not,\u201d Guan said. &#8220;I think either approach can be reasonable, but the advisory is a must. The users need to know the risk is real, and in many cases, they may never know. What the public often does not see is that vendors may reward researchers and silently patch the software, while end users never learn from release notes or public advisories that the risk existed.\u201d<\/p>\n<p>According to Guan, this shows why users need their own protections, either from a security company or user-controlled runtime isolation. But he said he does hope big tech \u201ctakes on the burden of clearly communicating\u201d security issues with users.<\/p>\n<p>\u201cBecause of that, I think companies should treat AI agents more like employees than ordinary software tools,\u201d he told us. \u201cBefore hiring an employee, companies do background checks. Before giving them access to systems, they define permissions. The same discipline should apply to AI agents.\u201d&nbsp;\u00ae<\/p>\n<\/p><\/div>\n<p><img decoding=\"async\" src=\"https:\/\/image.theregister.com\/?imageId=224154&#038;width=800\">READ MORE <a href=\"https:\/\/www.theregister.com\/security\/2026\/05\/20\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\/5243662\">HERE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p> Another day, another AI bug silently fixed with no CVE and no public disclosure READ MORE HERE&#8230;<\/p>\n","protected":false},"author":2,"featured_media":60697,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[63],"tags":[307],"class_list":["post-60696","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-the-register","tag-security"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Even Claude agrees: hole in its sandbox was real and dangerous 2026 | ThreatsHub Cybersecurity News<\/title>\n<meta name=\"description\" content=\"ThreatsHub Cybersecurity News | ThreatsHub.org | Cloud Security &amp; Cyber Threats Analysis Hub. 100% Free OSINT Threat Intelligent and Cybersecurity News.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.threatshub.org\/blog\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Even Claude agrees: hole in its sandbox was real and dangerous 2026 | ThreatsHub Cybersecurity News\" \/>\n<meta property=\"og:description\" content=\"ThreatsHub Cybersecurity News | ThreatsHub.org | Cloud Security &amp; Cyber Threats Analysis Hub. 100% Free OSINT Threat Intelligent and Cybersecurity News.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.threatshub.org\/blog\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\/\" \/>\n<meta property=\"og:site_name\" content=\"ThreatsHub Cybersecurity News\" \/>\n<meta property=\"article:published_time\" content=\"2026-05-20T20:34:15+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/image.theregister.com\/224154.jpg?imageId=224154&amp;x=0&amp;y=0&amp;cropw=100&amp;croph=100&amp;panox=0&amp;panoy=0&amp;panow=100&amp;panoh=100&amp;width=1200&amp;height=683\" \/>\n<meta name=\"author\" content=\"TH Author\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@threatshub\" \/>\n<meta name=\"twitter:site\" content=\"@threatshub\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"TH Author\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\\\/\"},\"author\":{\"name\":\"TH Author\",\"@id\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/#\\\/schema\\\/person\\\/12e0a8671ff89a863584f193e7062476\"},\"headline\":\"Even Claude agrees: hole in its sandbox was real and dangerous\",\"datePublished\":\"2026-05-20T20:34:15+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\\\/\"},\"wordCount\":858,\"publisher\":{\"@id\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/05\\\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous.jpg\",\"keywords\":[\"Security\"],\"articleSection\":[\"The Register\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\\\/\",\"url\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\\\/\",\"name\":\"Even Claude agrees: hole in its sandbox was real and dangerous 2026 | ThreatsHub Cybersecurity News\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/05\\\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous.jpg\",\"datePublished\":\"2026-05-20T20:34:15+00:00\",\"description\":\"ThreatsHub Cybersecurity News | ThreatsHub.org | Cloud Security & Cyber Threats Analysis Hub. 100% Free OSINT Threat Intelligent and Cybersecurity News.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/05\\\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous.jpg\",\"contentUrl\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/05\\\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous.jpg\",\"width\":100,\"height\":100},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Security\",\"item\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/tag\\\/security\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Even Claude agrees: hole in its sandbox was real and dangerous\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/#website\",\"url\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/\",\"name\":\"ThreatsHub Cybersecurity News\",\"description\":\"%%focuskw%% Threat Intel \u2013 Threat Intel Services \u2013 CyberIntelligence \u2013 Cyber Threat Intelligence - Threat Intelligence Feeds - Threat Intelligence Reports - CyberSecurity Report \u2013 Cyber Security PDF \u2013 Cybersecurity Trends - Cloud Sandbox \u2013- Threat IntelligencePortal \u2013 Incident Response \u2013 Threat Hunting \u2013 IOC - Yara - Security Operations Center \u2013 SecurityOperation Center \u2013 Security SOC \u2013 SOC Services - Advanced Threat - Threat Detection - TargetedAttack \u2013 APT \u2013 Anti-APT \u2013 Advanced Protection \u2013 Cyber Security Services \u2013 Cybersecurity Services -Threat Intelligence Platform\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/#organization\"},\"alternateName\":\"Threatshub.org\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/#organization\",\"name\":\"ThreatsHub.org\",\"alternateName\":\"Threatshub.org\",\"url\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/05\\\/Threatshub_Favicon1.jpg\",\"contentUrl\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/05\\\/Threatshub_Favicon1.jpg\",\"width\":432,\"height\":435,\"caption\":\"ThreatsHub.org\"},\"image\":{\"@id\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/x.com\\\/threatshub\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.threatshub.org\\\/blog\\\/#\\\/schema\\\/person\\\/12e0a8671ff89a863584f193e7062476\",\"name\":\"TH Author\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/066276f086d5155df79c850206a779ad368418a844da0182ce43f9cd5b506c3d?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/066276f086d5155df79c850206a779ad368418a844da0182ce43f9cd5b506c3d?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/066276f086d5155df79c850206a779ad368418a844da0182ce43f9cd5b506c3d?s=96&d=mm&r=g\",\"caption\":\"TH Author\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Even Claude agrees: hole in its sandbox was real and dangerous 2026 | ThreatsHub Cybersecurity News","description":"ThreatsHub Cybersecurity News | ThreatsHub.org | Cloud Security & Cyber Threats Analysis Hub. 100% Free OSINT Threat Intelligent and Cybersecurity News.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.threatshub.org\/blog\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\/","og_locale":"en_US","og_type":"article","og_title":"Even Claude agrees: hole in its sandbox was real and dangerous 2026 | ThreatsHub Cybersecurity News","og_description":"ThreatsHub Cybersecurity News | ThreatsHub.org | Cloud Security & Cyber Threats Analysis Hub. 100% Free OSINT Threat Intelligent and Cybersecurity News.","og_url":"https:\/\/www.threatshub.org\/blog\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\/","og_site_name":"ThreatsHub Cybersecurity News","article_published_time":"2026-05-20T20:34:15+00:00","og_image":[{"url":"https:\/\/image.theregister.com\/224154.jpg?imageId=224154&amp;x=0&amp;y=0&amp;cropw=100&amp;croph=100&amp;panox=0&amp;panoy=0&amp;panow=100&amp;panoh=100&amp;width=1200&amp;height=683","type":"","width":"","height":""}],"author":"TH Author","twitter_card":"summary_large_image","twitter_creator":"@threatshub","twitter_site":"@threatshub","twitter_misc":{"Written by":"TH Author","Est. reading time":"4 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.threatshub.org\/blog\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\/#article","isPartOf":{"@id":"https:\/\/www.threatshub.org\/blog\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\/"},"author":{"name":"TH Author","@id":"https:\/\/www.threatshub.org\/blog\/#\/schema\/person\/12e0a8671ff89a863584f193e7062476"},"headline":"Even Claude agrees: hole in its sandbox was real and dangerous","datePublished":"2026-05-20T20:34:15+00:00","mainEntityOfPage":{"@id":"https:\/\/www.threatshub.org\/blog\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\/"},"wordCount":858,"publisher":{"@id":"https:\/\/www.threatshub.org\/blog\/#organization"},"image":{"@id":"https:\/\/www.threatshub.org\/blog\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\/#primaryimage"},"thumbnailUrl":"https:\/\/www.threatshub.org\/blog\/coredata\/uploads\/2026\/05\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous.jpg","keywords":["Security"],"articleSection":["The Register"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.threatshub.org\/blog\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\/","url":"https:\/\/www.threatshub.org\/blog\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\/","name":"Even Claude agrees: hole in its sandbox was real and dangerous 2026 | ThreatsHub Cybersecurity News","isPartOf":{"@id":"https:\/\/www.threatshub.org\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.threatshub.org\/blog\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\/#primaryimage"},"image":{"@id":"https:\/\/www.threatshub.org\/blog\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\/#primaryimage"},"thumbnailUrl":"https:\/\/www.threatshub.org\/blog\/coredata\/uploads\/2026\/05\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous.jpg","datePublished":"2026-05-20T20:34:15+00:00","description":"ThreatsHub Cybersecurity News | ThreatsHub.org | Cloud Security & Cyber Threats Analysis Hub. 100% Free OSINT Threat Intelligent and Cybersecurity News.","breadcrumb":{"@id":"https:\/\/www.threatshub.org\/blog\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.threatshub.org\/blog\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.threatshub.org\/blog\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\/#primaryimage","url":"https:\/\/www.threatshub.org\/blog\/coredata\/uploads\/2026\/05\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous.jpg","contentUrl":"https:\/\/www.threatshub.org\/blog\/coredata\/uploads\/2026\/05\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous.jpg","width":100,"height":100},{"@type":"BreadcrumbList","@id":"https:\/\/www.threatshub.org\/blog\/even-claude-agrees-hole-in-its-sandbox-was-real-and-dangerous\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.threatshub.org\/blog\/"},{"@type":"ListItem","position":2,"name":"Security","item":"https:\/\/www.threatshub.org\/blog\/tag\/security\/"},{"@type":"ListItem","position":3,"name":"Even Claude agrees: hole in its sandbox was real and dangerous"}]},{"@type":"WebSite","@id":"https:\/\/www.threatshub.org\/blog\/#website","url":"https:\/\/www.threatshub.org\/blog\/","name":"ThreatsHub Cybersecurity News","description":"%%focuskw%% Threat Intel \u2013 Threat Intel Services \u2013 CyberIntelligence \u2013 Cyber Threat Intelligence - Threat Intelligence Feeds - Threat Intelligence Reports - CyberSecurity Report \u2013 Cyber Security PDF \u2013 Cybersecurity Trends - Cloud Sandbox \u2013- Threat IntelligencePortal \u2013 Incident Response \u2013 Threat Hunting \u2013 IOC - Yara - Security Operations Center \u2013 SecurityOperation Center \u2013 Security SOC \u2013 SOC Services - Advanced Threat - Threat Detection - TargetedAttack \u2013 APT \u2013 Anti-APT \u2013 Advanced Protection \u2013 Cyber Security Services \u2013 Cybersecurity Services -Threat Intelligence Platform","publisher":{"@id":"https:\/\/www.threatshub.org\/blog\/#organization"},"alternateName":"Threatshub.org","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.threatshub.org\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.threatshub.org\/blog\/#organization","name":"ThreatsHub.org","alternateName":"Threatshub.org","url":"https:\/\/www.threatshub.org\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.threatshub.org\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.threatshub.org\/blog\/coredata\/uploads\/2025\/05\/Threatshub_Favicon1.jpg","contentUrl":"https:\/\/www.threatshub.org\/blog\/coredata\/uploads\/2025\/05\/Threatshub_Favicon1.jpg","width":432,"height":435,"caption":"ThreatsHub.org"},"image":{"@id":"https:\/\/www.threatshub.org\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/x.com\/threatshub"]},{"@type":"Person","@id":"https:\/\/www.threatshub.org\/blog\/#\/schema\/person\/12e0a8671ff89a863584f193e7062476","name":"TH Author","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/066276f086d5155df79c850206a779ad368418a844da0182ce43f9cd5b506c3d?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/066276f086d5155df79c850206a779ad368418a844da0182ce43f9cd5b506c3d?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/066276f086d5155df79c850206a779ad368418a844da0182ce43f9cd5b506c3d?s=96&d=mm&r=g","caption":"TH Author"}}]}},"_links":{"self":[{"href":"https:\/\/www.threatshub.org\/blog\/wp-json\/wp\/v2\/posts\/60696","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.threatshub.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.threatshub.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.threatshub.org\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.threatshub.org\/blog\/wp-json\/wp\/v2\/comments?post=60696"}],"version-history":[{"count":0,"href":"https:\/\/www.threatshub.org\/blog\/wp-json\/wp\/v2\/posts\/60696\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.threatshub.org\/blog\/wp-json\/wp\/v2\/media\/60697"}],"wp:attachment":[{"href":"https:\/\/www.threatshub.org\/blog\/wp-json\/wp\/v2\/media?parent=60696"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.threatshub.org\/blog\/wp-json\/wp\/v2\/categories?post=60696"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.threatshub.org\/blog\/wp-json\/wp\/v2\/tags?post=60696"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}