{"id":3757,"date":"2026-06-25T22:32:58","date_gmt":"2026-06-25T22:32:58","guid":{"rendered":"https:\/\/www.ucartz.com\/updates\/n8n-prototype-pollution-vulnerability-cve-2026-54312-high-severity\/"},"modified":"2026-06-25T22:33:02","modified_gmt":"2026-06-25T22:33:02","slug":"n8n-prototype-pollution-vulnerability-cve-2026-54312-high-severity","status":"publish","type":"post","link":"https:\/\/www.ucartz.com\/updates\/n8n-prototype-pollution-vulnerability-cve-2026-54312-high-severity\/","title":{"rendered":"n8n Prototype Pollution Vulnerability (CVE-2026-54312) \u2014 High Severity"},"content":{"rendered":"<h2>Understanding the n8n Prototype Pollution Vulnerability<\/h2>\n<p>A significant security flaw has been identified in n8n, an open-source platform popular for automating workflows. This vulnerability, tracked as CVE-2026-54312, is a type of attack called &#8220;prototype pollution.&#8221; It allows an attacker to manipulate the core properties of JavaScript objects within the n8n server, leading to severe disruptions.<\/p>\n<p>Specifically, an authenticated user who has the ability to create or change workflows could exploit this by using the Microsoft SQL node. By providing a specially crafted input as the &#8220;table&#8221; parameter, they could inject malicious properties into the fundamental JavaScript `Object.prototype`. When this happens, it affects the entire n8n server process, causing various application-wide validation issues and effectively making the n8n instance completely unusable until it is manually restarted. This makes it a critical issue for any organization relying on n8n for their operations.<\/p>\n<h2>CVE Details<\/h2>\n<ul>\n<li><strong>Product:<\/strong> n8n workflow automation platform<\/li>\n<li><strong>Published Date:<\/strong> June 23, 2026<\/li>\n<li><strong>Severity:<\/strong> HIGH<\/li>\n<li><strong>Status:<\/strong> Analyzed<\/li>\n<\/ul>\n<h2>Affected Products<\/h2>\n<p>This vulnerability impacts versions of n8n prior to <strong>2.24.0<\/strong>. If you are running any version older than 2.24.0, your n8n instance is at risk.<\/p>\n<h2>Current Status<\/h2>\n<p>The vulnerability has been thoroughly analyzed, and a fix is available. Users are strongly encouraged to take immediate action to protect their systems.<\/p>\n<h2>Severity Level<\/h2>\n<p>This vulnerability is rated as <strong>HIGH<\/strong> severity. The ability for an authenticated user to render an entire n8n instance non-functional highlights the serious nature of this flaw. While it requires authenticated access, the widespread impact on availability makes it a critical concern for system administrators and developers.<\/p>\n<h2>Possible Solutions<\/h2>\n<p>The good news is that n8n has already released a patch to address this issue:<\/p>\n<ul>\n<li><strong>Upgrade to n8n version 2.24.0 or later:<\/strong> This is the primary and most effective solution. Upgrading your n8n instance to version 2.24.0 or any subsequent release will fix the prototype pollution vulnerability.<\/li>\n<\/ul>\n<h3>Temporary Mitigations (if immediate upgrade is not possible):<\/h3>\n<p>If you cannot upgrade your n8n instance right away, consider these temporary steps. Please remember these are not full fixes and should only be used short-term:<\/p>\n<ul>\n<li><strong>Restrict Workflow Permissions:<\/strong> Limit who can create or modify workflows to only the most trusted administrators. This reduces the attack surface by limiting the number of potential attackers.<\/li>\n<li><strong>Disable the Microsoft SQL Node:<\/strong> You can temporarily disable the vulnerable Microsoft SQL node by adding <code>n8n-nodes-base.microsoftSql<\/code> to the <code>NODES_EXCLUDE<\/code> environment variable in your n8n configuration. This prevents the specific attack vector from being exploited.<\/li>\n<\/ul>\n<h2>References<\/h2>\n<p>https:\/\/github.com\/n8n-io\/n8n\/security\/advisories\/GHSA-x6p3-m6h9-fx7r<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Understanding the n8n Prototype Pollution Vulnerability A significant security flaw has been identified in n8n, an open-source platform popular for automating workflows. This vulnerability, tracked as CVE-2026-54312, is a type of attack called &#8220;prototype pollution.&#8221; It allows an attacker to manipulate the core properties of JavaScript objects within the n8n server, leading to severe disruptions. [&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":[732,1067,1156,765,1068],"class_list":["post-3757","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-security","tag-cybersecurity","tag-n8n","tag-prototype-pollution","tag-security-update","tag-workflow-automation"],"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 Prototype Pollution Vulnerability (CVE-2026-54312) \u2014 High 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-prototype-pollution-vulnerability-cve-2026-54312-high-severity\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"n8n Prototype Pollution Vulnerability (CVE-2026-54312) \u2014 High Severity - Web Hosting and IT Consultancy Services\" \/>\n<meta property=\"og:description\" content=\"Understanding the n8n Prototype Pollution Vulnerability A significant security flaw has been identified in n8n, an open-source platform popular for automating workflows. This vulnerability, tracked as CVE-2026-54312, is a type of attack called &#8220;prototype pollution.&#8221; It allows an attacker to manipulate the core properties of JavaScript objects within the n8n server, leading to severe disruptions. 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