{"id":4414,"date":"2026-10-30T01:33:19","date_gmt":"2026-10-30T01:33:19","guid":{"rendered":"https:\/\/www.ucartz.com\/updates\/n8n-dom-based-cross-site-scripting-vulnerability-cve-2026-65597-high-severity\/"},"modified":"2026-10-30T01:33:21","modified_gmt":"2026-10-30T01:33:21","slug":"n8n-dom-based-cross-site-scripting-vulnerability-cve-2026-65597-high-severity","status":"publish","type":"post","link":"https:\/\/www.ucartz.com\/updates\/n8n-dom-based-cross-site-scripting-vulnerability-cve-2026-65597-high-severity\/","title":{"rendered":"n8n DOM-based Cross-Site Scripting Vulnerability (CVE-2026-65597) \u2014 High Severity"},"content":{"rendered":"<h2>Overview<\/h2>\n<p>A significant security flaw, identified as a DOM-based Cross-Site Scripting (XSS) vulnerability, has been found in the popular workflow automation tool n8n. This vulnerability affects various versions of n8n, specifically those prior to versions 1.123.64, 2.29.8, and 2.30.1. In simple terms, this means that a malicious script could potentially run inside a user&#8217;s web browser if they interact with a specially crafted preview in n8n. This could lead to an attacker gaining access to sensitive information or performing actions on behalf of the victim without their knowledge.<\/p>\n<p>The core of the issue lies in how n8n\u2019s HTML preview handles execution output. It renders content within an iframe without the necessary security sandbox protections. This oversight allows a crafted script to bypass existing security measures and execute with the same permissions as the editor, effectively compromising the user\u2019s session. An attacker with even low-level &#8220;global:member&#8221; privileges could exploit this to steal authenticated API session tokens from unsuspecting users who open such a preview.<\/p>\n<h2>CVE Details<\/h2>\n<p>Product: n8n<br \/>\nCVE ID: CVE-2026-65597<br \/>\nPublished: July 8, 2026<br \/>\nSeverity: High<br \/>\nStatus: Analyzed<\/p>\n<h2>Affected Products<\/h2>\n<p>The following n8n versions are known to be vulnerable:<\/p>\n<ul>\n<li>n8n versions prior to 1.123.64 (Community and Enterprise editions)<\/li>\n<li>n8n 2.x versions prior to 2.29.8 (Community and Enterprise editions)<\/li>\n<li>n8n versions prior to 2.30.1 (Community and Enterprise editions)<\/li>\n<\/ul>\n<h2>Current Status<\/h2>\n<p>This vulnerability has been thoroughly analyzed, and the details, including potential impact and solutions, are publicly available. Software updates have been released by n8n to address this critical flaw.<\/p>\n<h2>Severity Level<\/h2>\n<p>The vulnerability is rated as <strong>High Severity<\/strong>, with a CVSS score of 8.2. This high rating reflects the serious potential impact of a successful exploitation. An attacker with low privileges could exploit this flaw over the network with low complexity. The primary concern is the high impact on confidentiality, as an attacker could gain access to a victim&#8217;s authenticated session and call APIs, potentially leading to unauthorized data access or manipulation. The integrity of data could also be compromised, although to a lesser extent.<\/p>\n<h2>Possible Solutions<\/h2>\n<p>To protect your n8n instances from this DOM-based XSS vulnerability, it is crucial to implement the following solutions:<\/p>\n<h3>Patching<\/h3>\n<p>The most effective solution is to upgrade your n8n installation to a patched version. The issue has been fixed in:<\/p>\n<ul>\n<li>n8n version 1.123.64 or later<\/li>\n<li>n8n version 2.29.8 or later<\/li>\n<li>n8n version 2.30.1 or later<\/li>\n<\/ul>\n<p>Users should prioritize upgrading to one of these versions or any subsequent releases to fully remediate the vulnerability.<\/p>\n<h3>Temporary Mitigations (if immediate upgrade is not possible)<\/h3>\n<p>If you cannot upgrade immediately, consider these temporary steps to reduce risk. Please note, these do not fully eliminate the threat and should only be used as short-term measures:<\/p>\n<ul>\n<li>Restrict access to your n8n instance to only fully trusted users.<\/li>\n<li>Set the <code>N8N_CONTENT_SECURITY_POLICY<\/code> environment variable to a policy that specifically blocks inline scripts. This helps prevent injected scripts from executing.<\/li>\n<li>Avoid exposing workflows that render untrusted external input into the HTML node or binary HTML preview to users who are not fully trusted.<\/li>\n<\/ul>\n<h2>References<\/h2>\n<ul>\n<li>https:\/\/github.com\/n8n-io\/n8n\/security\/advisories\/GHSA-p3rg-hrf9-w9gj<\/li>\n<li>https:\/\/www.vulncheck.com\/advisories\/n8n-before-dom-based-xss-via-unsandboxed-iframe<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Overview A significant security flaw, identified as a DOM-based Cross-Site Scripting (XSS) vulnerability, has been found in the popular workflow automation tool n8n. This vulnerability affects various versions<\/p>\n","protected":false},"author":17,"featured_media":3515,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[817,1067,696,695,692],"class_list":["post-4414","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"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>n8n DOM-based Cross-Site Scripting (CVE-2026-65597) | Ucartz<\/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-dom-based-cross-site-scripting-vulnerability-cve-2026-65597-high-severity\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"n8n DOM-based Cross-Site Scripting Vulnerability (CVE-2026-65597) \u2014 High Severity - Ucartz Updates\" \/>\n<meta property=\"og:description\" content=\"Overview A significant security flaw, identified as a DOM-based Cross-Site Scripting (XSS) vulnerability, has been found in the popular workflow automation tool n8n. This vulnerability affects various versions\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ucartz.com\/updates\/n8n-dom-based-cross-site-scripting-vulnerability-cve-2026-65597-high-severity\/\" \/>\n<meta property=\"og:site_name\" content=\"Ucartz Updates\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-30T01:33:19+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-30T01:33:21+00:00\" \/>\n<meta name=\"author\" content=\"Alex Joseph\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Alex Joseph\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" 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