{"id":3569,"date":"2026-05-15T02:01:20","date_gmt":"2026-05-15T02:01:20","guid":{"rendered":"https:\/\/www.ucartz.com\/updates\/n8n-mcp-information-disclosure-vulnerability-cve-2026-42282-medium-severity\/"},"modified":"2026-05-15T02:01:20","modified_gmt":"2026-05-15T02:01:20","slug":"n8n-mcp-information-disclosure-vulnerability-cve-2026-42282-medium-severity","status":"publish","type":"post","link":"https:\/\/www.ucartz.com\/updates\/n8n-mcp-information-disclosure-vulnerability-cve-2026-42282-medium-severity\/","title":{"rendered":"n8n-MCP Information Disclosure Vulnerability (CVE-2026-42282) \u2014 Medium Severity"},"content":{"rendered":"<h2>Understanding the n8n-MCP Information Disclosure Vulnerability<\/h2>\n<p>A security vulnerability, identified as CVE-2026-42282, has been discovered in n8n-MCP, an MCP server designed to provide AI assistants with access to n8n node documentation and operations. This flaw could lead to the unintended exposure of sensitive information in server logs, posing a risk to the confidentiality of user credentials.<\/p>\n<h2>CVE Details<\/h2>\n<ul>\n<li><strong>Product:<\/strong> n8n-MCP<\/li>\n<li><strong>CVE ID:<\/strong> CVE-2026-42282<\/li>\n<li><strong>Published Date:<\/strong> May 8, 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 affects n8n-MCP versions prior to <strong>2.47.13<\/strong>. Specifically, when n8n-MCP is configured to run in HTTP transport mode, and authenticated requests are made to MCP tools, the full arguments and JSON-RPC parameters of these requests were logged unredacted. This means that if these requests carried sensitive data like credentials, those values could be stored directly in your server logs.<\/p>\n<h2>Current Status<\/h2>\n<p>The good news is that this information disclosure vulnerability has been officially recognized and addressed. A patch has been released in <strong>n8n-MCP version 2.47.13<\/strong>. This update ensures that sensitive data in authenticated requests is properly redacted before being written to server logs, mitigating the risk of accidental disclosure.<\/p>\n<h2>Severity Level<\/h2>\n<p>The vulnerability has been assigned a <strong>Medium<\/strong> severity rating with a CVSS score of 4.3. While it does not allow unauthenticated attackers to directly exploit the system, it could lead to the disclosure of critical information if logs are accessible to unauthorized individuals or external systems. The exposure of data such as bearer tokens, OAuth credentials, API keys, webhook authentication headers, or other secret payloads could have significant security implications, enabling further attacks or unauthorized access to other systems.<\/p>\n<h2>Possible Solutions<\/h2>\n<p>To protect your n8n-MCP deployments from this information disclosure vulnerability, the most critical step is to <strong>update to version 2.47.13 or later<\/strong>. This version includes the necessary patch to redact sensitive arguments and parameters from server logs. System administrators and developers should prioritize this update to secure their environments. Regularly reviewing and securing your log collection and storage practices is also a crucial complementary measure.<\/p>\n<h2>References<\/h2>\n<p>https:\/\/github.com\/czlonkowski\/n8n-mcp\/commit\/59b665bda36797823df238aeaf20adb862c9f451<\/p>\n<p>https:\/\/github.com\/czlonkowski\/n8n-mcp\/releases\/tag\/v2.47.13<\/p>\n<p>https:\/\/github.com\/czlonkowski\/n8n-mcp\/security\/advisories\/GHSA-wg4g-395p-mqv3<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Understanding the n8n-MCP Information Disclosure Vulnerability A security vulnerability, identified as CVE-2026-42282, has been discovered in n8n-MCP, an MCP server designed to provide AI assistants with access to n8n node documentation and operations. This flaw could lead to the unintended exposure of sensitive information in server logs, posing a risk to the confidentiality of user [&hellip;]<\/p>\n","protected":false},"author":17,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[844,1094,1093,1095,1083],"class_list":["post-3569","post","type-post","status-publish","format-standard","hentry","category-security","tag-api-security","tag-credentials","tag-informationdisclosure","tag-logsecurity","tag-n8n-mcp"],"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-MCP Information Disclosure Vulnerability (CVE-2026-42282) \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-mcp-information-disclosure-vulnerability-cve-2026-42282-medium-severity\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"n8n-MCP Information Disclosure Vulnerability (CVE-2026-42282) \u2014 Medium Severity - Web Hosting and IT Consultancy Services\" \/>\n<meta property=\"og:description\" content=\"Understanding the n8n-MCP Information Disclosure Vulnerability A security vulnerability, identified as CVE-2026-42282, has been discovered in n8n-MCP, an MCP server designed to provide AI assistants with access to n8n node documentation and operations. This flaw could lead to the unintended exposure of sensitive information in server logs, posing a risk to the confidentiality of user [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ucartz.com\/updates\/n8n-mcp-information-disclosure-vulnerability-cve-2026-42282-medium-severity\/\" \/>\n<meta property=\"og:site_name\" content=\"Web Hosting and IT Consultancy Services\" \/>\n<meta property=\"article:published_time\" content=\"2026-05-15T02:01:20+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=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/n8n-mcp-information-disclosure-vulnerability-cve-2026-42282-medium-severity\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/n8n-mcp-information-disclosure-vulnerability-cve-2026-42282-medium-severity\\\/\"},\"author\":{\"name\":\"Alex Joseph\",\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/#\\\/schema\\\/person\\\/1ba9bfab02a76dee216c9f55bb634e56\"},\"headline\":\"n8n-MCP Information Disclosure Vulnerability (CVE-2026-42282) \u2014 Medium Severity\",\"datePublished\":\"2026-05-15T02:01:20+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/n8n-mcp-information-disclosure-vulnerability-cve-2026-42282-medium-severity\\\/\"},\"wordCount\":380,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/#organization\"},\"keywords\":[\"API Security\",\"Credentials\",\"InformationDisclosure\",\"LogSecurity\",\"N8n Mcp\"],\"articleSection\":[\"Security\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/n8n-mcp-information-disclosure-vulnerability-cve-2026-42282-medium-severity\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/n8n-mcp-information-disclosure-vulnerability-cve-2026-42282-medium-severity\\\/\",\"url\":\"https:\\\/\\\/www.ucartz.com\\\/updates\\\/n8n-mcp-information-disclosure-vulnerability-cve-2026-42282-medium-severity\\\/\",\"name\":\"n8n-MCP Information Disclosure Vulnerability (CVE-2026-42282) \u2014 Medium Severity - 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