{"id":3749,"date":"2026-06-25T19:34:08","date_gmt":"2026-06-25T19:34:08","guid":{"rendered":"https:\/\/www.ucartz.com\/updates\/n8n-reflected-cross-site-scripting-vulnerability-cve-2026-54303-medium-severity\/"},"modified":"2026-06-25T19:34:11","modified_gmt":"2026-06-25T19:34:11","slug":"n8n-reflected-cross-site-scripting-vulnerability-cve-2026-54303-medium-severity","status":"publish","type":"post","link":"https:\/\/www.ucartz.com\/updates\/n8n-reflected-cross-site-scripting-vulnerability-cve-2026-54303-medium-severity\/","title":{"rendered":"n8n Reflected Cross-Site Scripting Vulnerability (CVE-2026-54303) \u2014 Medium Severity"},"content":{"rendered":"<p>n8n, a popular open-source platform for workflow automation, has addressed a security flaw that could allow malicious code to run in your browser. This vulnerability, known as reflected Cross-Site Scripting (XSS), specifically affects certain trigger nodes used for integrations with Meta (Facebook, WhatsApp) and Microsoft Teams.<\/p>\n<p>In simple terms, an XSS vulnerability means that if a logged-in n8n user clicks on a specially crafted, harmful web link, an attacker could potentially inject and execute their own code within the user&#8217;s web browser. This can lead to unauthorized actions or information theft.<\/p>\n<h2>CVE Details<\/h2>\n<ul>\n<li><strong>Product Name:<\/strong> n8n<\/li>\n<li><strong>Published:<\/strong> June 23, 2026<\/li>\n<li><strong>Severity:<\/strong> Medium<\/li>\n<li><strong>Status:<\/strong> Analyzed<\/li>\n<\/ul>\n<h2>Affected Products<\/h2>\n<p>This vulnerability impacts n8n versions prior to <strong>2.24.0<\/strong>. If you are running any version older than 2.24.0, your instance is susceptible to this reflected XSS attack.<\/p>\n<h2>Current Status<\/h2>\n<p>The good news is that this vulnerability has been thoroughly analyzed and a fix is readily available. The n8n team has released an update that resolves the issue.<\/p>\n<h2>Severity Level<\/h2>\n<p>Rated as &#8220;Medium&#8221; severity, this reflected XSS vulnerability should not be overlooked. While it requires user interaction (a logged-in user clicking a malicious link), a successful exploit could lead to serious consequences, including unauthorized access to sensitive data within the n8n application or session hijacking. It&#8217;s crucial to patch your systems promptly to mitigate these risks.<\/p>\n<h2>Possible Solutions<\/h2>\n<p>The primary solution for this vulnerability is to upgrade your n8n instance to a patched version. Users are strongly advised to update to <strong>n8n version 2.24.0 or later<\/strong> as soon as possible.<\/p>\n<p>If an immediate upgrade is not feasible, here are some temporary mitigation steps:<\/p>\n<ul>\n<li>Restrict the permissions for creating and activating workflows to only fully trusted users. This limits who can potentially introduce or exploit such vulnerabilities.<\/li>\n<li>Disable the affected trigger nodes by adding the following to your <code>NODES_EXCLUDE<\/code> environment variable: <code>n8n-nodes-base.facebookTrigger<\/code>, <code>n8n-nodes-base.whatsAppTrigger<\/code>, <code>n8n-nodes-base.facebookLeadAdsTrigger<\/code>, and <code>n8n-nodes-base.microsoftTeamsTrigger<\/code>.<\/li>\n<\/ul>\n<p>Please note that these workarounds are temporary and do not fully eliminate the risk. The best course of action remains a full upgrade to a patched version.<\/p>\n<h2>References<\/h2>\n<p>https:\/\/github.com\/n8n-io\/n8n\/security\/advisories\/GHSA-h86q-fx34-gfjr<\/p>\n","protected":false},"excerpt":{"rendered":"<p>n8n, a popular open-source platform for workflow automation, has addressed a security flaw that could allow malicious code to run in your browser. This vulnerability, known as reflected Cross-Site Scripting (XSS), specifically affects certain trigger nodes used for integrations with Meta (Facebook, WhatsApp) and Microsoft Teams. In simple terms, an XSS vulnerability means that if [&hellip;]<\/p>\n","protected":false},"author":17,"featured_media":3515,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[817,1067,696,695,692],"class_list":["post-3749","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-security","tag-cross-site-scripting","tag-n8n","tag-vulnerability","tag-web-security","tag-xss"],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>n8n Reflected Cross-Site Scripting Vulnerability (CVE-2026-54303) \u2014 Medium Severity - Web Hosting and IT Consultancy Services<\/title>\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.ucartz.com\/updates\/n8n-reflected-cross-site-scripting-vulnerability-cve-2026-54303-medium-severity\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"n8n Reflected Cross-Site Scripting Vulnerability (CVE-2026-54303) \u2014 Medium Severity - Web Hosting and IT Consultancy Services\" \/>\n<meta property=\"og:description\" content=\"n8n, a popular open-source platform for workflow automation, has addressed a security flaw that could allow malicious code to run in your browser. 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