{"id":660,"date":"2026-06-08T15:58:46","date_gmt":"2026-06-08T10:28:46","guid":{"rendered":"https:\/\/www.hexnode.com\/threat-watch\/?p=660"},"modified":"2026-08-18T16:20:56","modified_gmt":"2026-08-18T10:50:56","slug":"toshiba-and-muji-website-warning-polyfillio-login-prompts","status":"publish","type":"post","link":"https:\/\/www.hexnode.com\/threat-watch\/toshiba-and-muji-website-warning-polyfillio-login-prompts\/","title":{"rendered":"Polyfill Remnants Turn Trusted Brand Websites Into Credential Prompt Risk"},"content":{"rendered":"<p>Organizations often focus on patching vulnerabilities and securing infrastructure, but dormant third-party dependencies can quietly reintroduce risk. Recent Toshiba and Muji website warnings show how legacy external references create phishing opportunities. This happens even when the websites themselves remain uncompromised.<\/p>\n<p><center>    \t\t<!-- button style scb6aaa006dc095ba618bc1777be3a12f2a -->\r\n    \t\t<style>\r\n    \t\t\t.scb6aaa006dc095ba618bc1777be3a12f2a, a.scb6aaa006dc095ba618bc1777be3a12f2a{\r\n    \t\t\t\tcolor: #fff;\r\n    \t\t\t\tbackground-color: ;\r\n    \t\t\t}\r\n    \t\t\t.scb6aaa006dc095ba618bc1777be3a12f2a:hover, a.scb6aaa006dc095ba618bc1777be3a12f2a:hover{\r\n    \t\t\t\t    \t\t\t\tbackground-color: #323232;\r\n    \t\t\t}\r\n    \t\t<\/style>\r\n    \t\t<a href=\"https:\/\/www.hexnode.com\/idp\/\" class=\"ht-shortcodes-button scb6aaa006dc095ba618bc1777be3a12f2a  hn-cta__blogs--inline-button \" id=\"\" style=\"\" >\r\n    \t\tStrengthen identity security with Hexnode<\/a>\r\n    \t\t<\/center><\/p>\n<h2>Suspicious Polyfill login prompts pop up on Toshiba, Muji websites<\/h2>\n<p>According to reports, Toshiba and Muji warned visitors about unexpected browser authentication prompts appearing on portions of their websites. The issue stemmed from Polyfill.io. This JavaScript service engaged in malicious activity after changing ownership in 2024.<\/p>\n<p>Toshiba advised users not to enter any information into the prompt and instructed visitors to select &#8220;Cancel&#8221; if it appeared. Muji similarly warned that the suspicious authentication requests originated from the external Polyfill.io service.<\/p>\n<p>Both organizations reportedly removed the dependency and resolved the issue. The incident also affected several other Japanese organizations, including Zojirushi, FiNC Technologies, Ishiyaku Publishers, and Hobonichi.<\/p>\n<p>Security researcher Pasquale Pillitteri reported that Polyfill.io reactivated in late May 2026. It began issuing HTTP 401 requests, forcing browsers to display native login dialogs.<\/p>\n<p>At the time of reporting, no evidence showed the affected websites were compromised. There was also no proof that entered credentials were stolen.<\/p>\n<h2>How stale script dependencies create credential phishing risks<\/h2>\n<p>Toshiba and Muji website warning illustrates a common web supply chain security challenge. Many organizations continue to reference third-party JavaScript libraries long after they stop actively managing them.<\/p>\n<p>When a browser requests a resource and receives an HTTP 401 authentication challenge, it may display a built-in username and password prompt. Unlike traditional <a href=\"https:\/\/www.hexnode.com\/blogs\/explained\/what-is-phishing\/\">phishing<\/a> pages, these browser-generated dialogs often appear more legitimate because users encounter them while visiting a trusted website.<\/p>\n<p>This creates a dangerous scenario:<\/p>\n<ul>\n<li>Users trust the website they are visiting.<\/li>\n<li>The authentication prompt appears native to the browser.<\/li>\n<li>Victims may assume the request is legitimate.<\/li>\n<li>Attackers do not need direct access to the website&#8217;s infrastructure.<\/li>\n<\/ul>\n<p>Consequently, abandoned third-party services can become effective credential phishing vectors. These flaws ultimately undermine enterprise identity security programs<\/p>\n<h2>Why organizations should care<\/h2>\n<p>The Polyfill incident demonstrates that web supply chain security extends beyond software development. Security teams must continuously monitor external dependencies because:<\/p>\n<ul>\n<li>Legacy scripts can remain embedded for years.<\/li>\n<li>Third-party providers may change ownership or behavior.<\/li>\n<li>Browser-based authentication prompts can bypass user suspicion.<\/li>\n<li>Credential theft can lead to account takeover and broader security incidents.<\/li>\n<\/ul>\n<p>Effective governance requires organizations to inventory external scripts, remove unused dependencies, and continuously validate trusted services.<\/p>\n<h2>How Hexnode helps strengthen endpoint compliance and access control<\/h2>\n<p>While organizations cannot eliminate every external threat, they can reduce exposure by strengthening endpoint compliance, access control, and device visibility.<\/p>\n<p><a href=\"https:\/\/www.hexnode.com\/uem\/\">Hexnode UEM<\/a> can integrate with Microsoft Entra Conditional Access to help organizations enforce access policies based on device compliance data from Hexnode. This integration supports Android, iOS, and macOS 11+ devices. Devices must be enrolled and managed in Hexnode UEM before they can be registered with Microsoft Entra ID for <a href=\"https:\/\/www.hexnode.com\/blogs\/conditional-access-explained\/\">Conditional Access<\/a>.<\/p>\n<div class=\"next_blog\"><div class=\"post-next\"><div class=\"hex_blog_box_parent\"><div class=\"blog_warp_next\"><div class=\"next_blog_thumb\" style=\"background-image:url(https:\/\/www.hexnode.com\/threat-watch\/wp-content\/uploads\/2026\/08\/whats-uem.webp?format=webp)\"><\/div><div class=\"next_post_content\"><div class=\"center_box\"><h4>What is Unified Endpoint Management (UEM)?<\/h4><p>Learn how UEM simplifies endpoint management, security, and compliance.<\/p><\/div><\/div><\/div><a class=\"hex_blog_box_link hn-cta__blogs--blog-box\" href=\"https:\/\/www.hexnode.com\/blogs\/what-is-unified-endpoint-management-uem\/\" aria-label=\"What is Unified Endpoint Management (UEM)?\"><\/a><\/div><\/div><\/div>\n<p>With this setup, IT admins can grant access to organizational resources based on compliance and authorization requirements, allowing only secure and authorized devices to access corporate data. Hexnode also allows admins to review device registration status and compliance-related information from the Hexnode UEM portal.<\/p>\n<p>For threat investigation workflows, <a href=\"https:\/\/www.hexnode.com\/xdr\/\">Hexnode XDR<\/a> helps with unified defense approach that correlates third-party vulnerability scanner alerts with native endpoint telemetry. Hexnode UEM establishes the security baseline by tracking device compliance, enforcing encryption, and managing OS and application versions. Hexnode XDR monitors real-time endpoint events and helps detect behavioral patterns that may indicate active exploitation, such as anomalous file changes or unauthorized network beaconing.<\/p>\n<p>By combining Hexnode UEM compliance enforcement, Microsoft Entra Conditional Access integration, and XDR threat correlation capabilities, organizations can improve endpoint security and access control workflows.<\/p>\n<h2>Conclusion<\/h2>\n<p>The Toshiba and Muji website warning serve as reminders that third-party web dependencies can remain security liabilities long after organizations stop paying attention to them. Even without a direct website compromise, abandoned services can create convincing credential phishing opportunities that put users and businesses at risk.<\/p>\n<p>Organizations should continuously audit external scripts, eliminate unnecessary dependencies, strengthen identity security controls, and maintain visibility across endpoints. As web supply chain threats continue to evolve, proactive monitoring and rapid investigation capabilities remain essential for reducing credential-related risk.<\/p>\n<div class=\"signup_box\"><div class=\"signup_wrap_img\"><div class=\"signup-bg\" style=\"background-image:url(https:\/\/www.hexnode.com\/threat-watch\/wp-content\/uploads\/2026\/08\/Hexnode-MDM-free-trial.jpg?format=webp)\"><\/div><\/div><div class=\"signup_wrap\"><h5>Start securing endpoints with unified visibility<\/h5><p>Reduce security gaps with centralized endpoint management and compliance controls.<\/p><a href=\"https:\/\/www.hexnode.com\/mobile-device-management\/cloud\/signup\/\" class=\"hn-cta__blogs--signup-stripe\" target=\"_blank\"> Start Your Free Trial! <\/a><\/div><\/div>\n<div class=\"faq-section-wrapper\" itemscope itemtype=\"https:\/\/schema.org\/FAQPage\"><h2 class=\"faq-main-title\">FAQs<\/h2><div class=\"faq-items\"><div class=\"faq-item\" itemprop=\"mainEntity\" itemscope itemtype=\"https:\/\/schema.org\/Question\"><div class=\"faq-item__question\" role=\"button\" tabindex=\"0\" aria-expanded=\"false\"><span itemprop=\"name\">What is Polyfill.io?<\/span>\n            <div class=\"toggle\" aria-hidden=\"true\"><span><\/span><span><\/span><\/div>\n        <\/div>\n<div class=\"faq-item__content\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\"><div class=\"faq-item__body\" itemprop=\"text\"><p>Polyfill.io is a service that provides JavaScript code to enable modern web features on older browsers. The service gained security attention after a change in ownership raised concerns about malicious script delivery.<\/p>\n<\/div><\/div><\/div>\n<div class=\"faq-item\" itemprop=\"mainEntity\" itemscope itemtype=\"https:\/\/schema.org\/Question\"><div class=\"faq-item__question\" role=\"button\" tabindex=\"0\" aria-expanded=\"false\"><span itemprop=\"name\">Why are browser login prompts a credential phishing risk?<\/span>\n            <div class=\"toggle\" aria-hidden=\"true\"><span><\/span><span><\/span><\/div>\n        <\/div>\n<div class=\"faq-item__content\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\"><div class=\"faq-item__body\" itemprop=\"text\"><p>Browser-generated authentication prompts often appear legitimate because they are displayed by the browser itself. When users encounter these prompts on trusted websites, they may be more likely to enter credentials, making them effective phishing mechanisms.<\/p>\n<\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Organizations often focus on patching vulnerabilities and securing infrastructure, but dormant third-party dependencies can quietly&#8230;<\/p>\n","protected":false},"author":6,"featured_media":661,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,14],"class_list":["post-660","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-identity-abuse","category-supply-chain-attack","product_category-identity-provider","tab_group-identity-and-phishing"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Toshiba and Muji Website Warning Over Polyfill.io Login Prompts<\/title>\n<meta name=\"description\" content=\"Toshiba and Muji website warning highlights suspicious Polyfill.io login prompts and the growing risk of credential phishing attacks.\" \/>\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.hexnode.com\/threat-watch\/toshiba-and-muji-website-warning-polyfillio-login-prompts\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Toshiba and Muji Website Warning Over Polyfill.io Login Prompts\" \/>\n<meta property=\"og:description\" content=\"Toshiba and Muji website warning highlights suspicious Polyfill.io login prompts and the growing risk of credential phishing attacks.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.hexnode.com\/threat-watch\/toshiba-and-muji-website-warning-polyfillio-login-prompts\/\" \/>\n<meta property=\"og:site_name\" content=\"Hexnode Threat Watch\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/Hexnode\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-06-08T10:28:46+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-08-18T10:50:56+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.hexnode.com\/threat-watch\/wp-content\/uploads\/2026\/08\/Polyfill-Remnants-Turn-Trusted-Brand-Websites-Into-Credential-Prompt-Risk.png?format=webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1340\" \/>\n\t<meta property=\"og:image:height\" content=\"700\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Lily Anne\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@thehexnode\" \/>\n<meta name=\"twitter:site\" content=\"@thehexnode\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Lily Anne\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":[\"Article\",\"BlogPosting\"],\"@id\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/toshiba-and-muji-website-warning-polyfillio-login-prompts\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/toshiba-and-muji-website-warning-polyfillio-login-prompts\\\/\"},\"author\":{\"name\":\"Lily Anne\",\"@id\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/#\\\/schema\\\/person\\\/072b33718ec5df7cb7dbb9bae93044fa\"},\"headline\":\"Polyfill Remnants Turn Trusted Brand Websites Into Credential Prompt Risk\",\"datePublished\":\"2026-06-08T10:28:46+00:00\",\"dateModified\":\"2026-08-18T10:50:56+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/toshiba-and-muji-website-warning-polyfillio-login-prompts\\\/\"},\"wordCount\":848,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/toshiba-and-muji-website-warning-polyfillio-login-prompts\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/Polyfill-Remnants-Turn-Trusted-Brand-Websites-Into-Credential-Prompt-Risk.png?format=webp\",\"articleSection\":[\"Identity Abuse\",\"Supply Chain Attack\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/toshiba-and-muji-website-warning-polyfillio-login-prompts\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/toshiba-and-muji-website-warning-polyfillio-login-prompts\\\/\",\"url\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/toshiba-and-muji-website-warning-polyfillio-login-prompts\\\/\",\"name\":\"Toshiba and Muji Website Warning Over Polyfill.io Login Prompts\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/toshiba-and-muji-website-warning-polyfillio-login-prompts\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/toshiba-and-muji-website-warning-polyfillio-login-prompts\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/Polyfill-Remnants-Turn-Trusted-Brand-Websites-Into-Credential-Prompt-Risk.png?format=webp\",\"datePublished\":\"2026-06-08T10:28:46+00:00\",\"dateModified\":\"2026-08-18T10:50:56+00:00\",\"description\":\"Toshiba and Muji website warning highlights suspicious Polyfill.io login prompts and the growing risk of credential phishing attacks.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/toshiba-and-muji-website-warning-polyfillio-login-prompts\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/toshiba-and-muji-website-warning-polyfillio-login-prompts\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/toshiba-and-muji-website-warning-polyfillio-login-prompts\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/Polyfill-Remnants-Turn-Trusted-Brand-Websites-Into-Credential-Prompt-Risk.png?format=webp\",\"contentUrl\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/Polyfill-Remnants-Turn-Trusted-Brand-Websites-Into-Credential-Prompt-Risk.png?format=webp\",\"width\":1340,\"height\":700,\"caption\":\"Polyfill Remnants Turn Trusted Brand Websites Into Credential Prompt Risk\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/toshiba-and-muji-website-warning-polyfillio-login-prompts\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Polyfill Remnants Turn Trusted Brand Websites Into Credential Prompt Risk\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/#website\",\"url\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/\",\"name\":\"Hexnode Threat Watch\",\"description\":\"Latest cyber threats, smarter enterprise response.\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/#organization\"},\"alternateName\":\"Threat Watch\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/#organization\",\"name\":\"Hexnode\",\"url\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/hexnode-2.png?format=webp\",\"contentUrl\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/hexnode-2.png?format=webp\",\"width\":100,\"height\":100,\"caption\":\"Hexnode\"},\"image\":{\"@id\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/Hexnode\\\/\",\"https:\\\/\\\/x.com\\\/thehexnode\",\"https:\\\/\\\/www.linkedin.com\\\/company\\\/hexnode\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/#\\\/schema\\\/person\\\/072b33718ec5df7cb7dbb9bae93044fa\",\"name\":\"Lily Anne\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/a5e6255489d50e4ae3ff1f9194f7ae879725d6b1d5eb4c9ec7a7f9ba3f66124e?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/a5e6255489d50e4ae3ff1f9194f7ae879725d6b1d5eb4c9ec7a7f9ba3f66124e?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/a5e6255489d50e4ae3ff1f9194f7ae879725d6b1d5eb4c9ec7a7f9ba3f66124e?s=96&d=mm&r=g\",\"caption\":\"Lily Anne\"},\"url\":\"https:\\\/\\\/www.hexnode.com\\\/threat-watch\\\/author\\\/lily-anne\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Toshiba and Muji Website Warning Over Polyfill.io Login Prompts","description":"Toshiba and Muji website warning highlights suspicious Polyfill.io login prompts and the growing risk of credential phishing attacks.","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.hexnode.com\/threat-watch\/toshiba-and-muji-website-warning-polyfillio-login-prompts\/","og_locale":"en_US","og_type":"article","og_title":"Toshiba and Muji Website Warning Over Polyfill.io Login Prompts","og_description":"Toshiba and Muji website warning highlights suspicious Polyfill.io login prompts and the growing risk of credential phishing attacks.","og_url":"https:\/\/www.hexnode.com\/threat-watch\/toshiba-and-muji-website-warning-polyfillio-login-prompts\/","og_site_name":"Hexnode Threat Watch","article_publisher":"https:\/\/www.facebook.com\/Hexnode\/","article_published_time":"2026-06-08T10:28:46+00:00","article_modified_time":"2026-08-18T10:50:56+00:00","og_image":[{"width":1340,"height":700,"url":"https:\/\/www.hexnode.com\/threat-watch\/wp-content\/uploads\/2026\/08\/Polyfill-Remnants-Turn-Trusted-Brand-Websites-Into-Credential-Prompt-Risk.png?format=webp","type":"image\/png"}],"author":"Lily Anne","twitter_card":"summary_large_image","twitter_creator":"@thehexnode","twitter_site":"@thehexnode","twitter_misc":{"Written by":"Lily Anne","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":["Article","BlogPosting"],"@id":"https:\/\/www.hexnode.com\/threat-watch\/toshiba-and-muji-website-warning-polyfillio-login-prompts\/#article","isPartOf":{"@id":"https:\/\/www.hexnode.com\/threat-watch\/toshiba-and-muji-website-warning-polyfillio-login-prompts\/"},"author":{"name":"Lily Anne","@id":"https:\/\/www.hexnode.com\/threat-watch\/#\/schema\/person\/072b33718ec5df7cb7dbb9bae93044fa"},"headline":"Polyfill Remnants Turn Trusted Brand Websites Into Credential Prompt Risk","datePublished":"2026-06-08T10:28:46+00:00","dateModified":"2026-08-18T10:50:56+00:00","mainEntityOfPage":{"@id":"https:\/\/www.hexnode.com\/threat-watch\/toshiba-and-muji-website-warning-polyfillio-login-prompts\/"},"wordCount":848,"commentCount":0,"publisher":{"@id":"https:\/\/www.hexnode.com\/threat-watch\/#organization"},"image":{"@id":"https:\/\/www.hexnode.com\/threat-watch\/toshiba-and-muji-website-warning-polyfillio-login-prompts\/#primaryimage"},"thumbnailUrl":"https:\/\/www.hexnode.com\/threat-watch\/wp-content\/uploads\/2026\/08\/Polyfill-Remnants-Turn-Trusted-Brand-Websites-Into-Credential-Prompt-Risk.png?format=webp","articleSection":["Identity Abuse","Supply Chain Attack"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.hexnode.com\/threat-watch\/toshiba-and-muji-website-warning-polyfillio-login-prompts\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.hexnode.com\/threat-watch\/toshiba-and-muji-website-warning-polyfillio-login-prompts\/","url":"https:\/\/www.hexnode.com\/threat-watch\/toshiba-and-muji-website-warning-polyfillio-login-prompts\/","name":"Toshiba and Muji Website Warning Over Polyfill.io Login Prompts","isPartOf":{"@id":"https:\/\/www.hexnode.com\/threat-watch\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.hexnode.com\/threat-watch\/toshiba-and-muji-website-warning-polyfillio-login-prompts\/#primaryimage"},"image":{"@id":"https:\/\/www.hexnode.com\/threat-watch\/toshiba-and-muji-website-warning-polyfillio-login-prompts\/#primaryimage"},"thumbnailUrl":"https:\/\/www.hexnode.com\/threat-watch\/wp-content\/uploads\/2026\/08\/Polyfill-Remnants-Turn-Trusted-Brand-Websites-Into-Credential-Prompt-Risk.png?format=webp","datePublished":"2026-06-08T10:28:46+00:00","dateModified":"2026-08-18T10:50:56+00:00","description":"Toshiba and Muji website warning highlights suspicious Polyfill.io login prompts and the growing risk of credential phishing attacks.","breadcrumb":{"@id":"https:\/\/www.hexnode.com\/threat-watch\/toshiba-and-muji-website-warning-polyfillio-login-prompts\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.hexnode.com\/threat-watch\/toshiba-and-muji-website-warning-polyfillio-login-prompts\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.hexnode.com\/threat-watch\/toshiba-and-muji-website-warning-polyfillio-login-prompts\/#primaryimage","url":"https:\/\/www.hexnode.com\/threat-watch\/wp-content\/uploads\/2026\/08\/Polyfill-Remnants-Turn-Trusted-Brand-Websites-Into-Credential-Prompt-Risk.png?format=webp","contentUrl":"https:\/\/www.hexnode.com\/threat-watch\/wp-content\/uploads\/2026\/08\/Polyfill-Remnants-Turn-Trusted-Brand-Websites-Into-Credential-Prompt-Risk.png?format=webp","width":1340,"height":700,"caption":"Polyfill Remnants Turn Trusted Brand Websites Into Credential Prompt Risk"},{"@type":"BreadcrumbList","@id":"https:\/\/www.hexnode.com\/threat-watch\/toshiba-and-muji-website-warning-polyfillio-login-prompts\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.hexnode.com\/threat-watch\/"},{"@type":"ListItem","position":2,"name":"Polyfill Remnants Turn Trusted Brand Websites Into Credential Prompt Risk"}]},{"@type":"WebSite","@id":"https:\/\/www.hexnode.com\/threat-watch\/#website","url":"https:\/\/www.hexnode.com\/threat-watch\/","name":"Hexnode Threat Watch","description":"Latest cyber threats, smarter enterprise response.","publisher":{"@id":"https:\/\/www.hexnode.com\/threat-watch\/#organization"},"alternateName":"Threat Watch","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.hexnode.com\/threat-watch\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.hexnode.com\/threat-watch\/#organization","name":"Hexnode","url":"https:\/\/www.hexnode.com\/threat-watch\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.hexnode.com\/threat-watch\/#\/schema\/logo\/image\/","url":"https:\/\/www.hexnode.com\/threat-watch\/wp-content\/uploads\/2026\/08\/hexnode-2.png?format=webp","contentUrl":"https:\/\/www.hexnode.com\/threat-watch\/wp-content\/uploads\/2026\/08\/hexnode-2.png?format=webp","width":100,"height":100,"caption":"Hexnode"},"image":{"@id":"https:\/\/www.hexnode.com\/threat-watch\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/Hexnode\/","https:\/\/x.com\/thehexnode","https:\/\/www.linkedin.com\/company\/hexnode"]},{"@type":"Person","@id":"https:\/\/www.hexnode.com\/threat-watch\/#\/schema\/person\/072b33718ec5df7cb7dbb9bae93044fa","name":"Lily Anne","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/a5e6255489d50e4ae3ff1f9194f7ae879725d6b1d5eb4c9ec7a7f9ba3f66124e?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/a5e6255489d50e4ae3ff1f9194f7ae879725d6b1d5eb4c9ec7a7f9ba3f66124e?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/a5e6255489d50e4ae3ff1f9194f7ae879725d6b1d5eb4c9ec7a7f9ba3f66124e?s=96&d=mm&r=g","caption":"Lily Anne"},"url":"https:\/\/www.hexnode.com\/threat-watch\/author\/lily-anne\/"}]}},"_links":{"self":[{"href":"https:\/\/www.hexnode.com\/threat-watch\/wp-json\/wp\/v2\/posts\/660","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hexnode.com\/threat-watch\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hexnode.com\/threat-watch\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hexnode.com\/threat-watch\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hexnode.com\/threat-watch\/wp-json\/wp\/v2\/comments?post=660"}],"version-history":[{"count":2,"href":"https:\/\/www.hexnode.com\/threat-watch\/wp-json\/wp\/v2\/posts\/660\/revisions"}],"predecessor-version":[{"id":663,"href":"https:\/\/www.hexnode.com\/threat-watch\/wp-json\/wp\/v2\/posts\/660\/revisions\/663"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.hexnode.com\/threat-watch\/wp-json\/wp\/v2\/media\/661"}],"wp:attachment":[{"href":"https:\/\/www.hexnode.com\/threat-watch\/wp-json\/wp\/v2\/media?parent=660"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hexnode.com\/threat-watch\/wp-json\/wp\/v2\/categories?post=660"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}