{"id":9836,"date":"2026-01-13T10:04:12","date_gmt":"2026-01-13T10:04:12","guid":{"rendered":"https:\/\/serisec.com\/index.php\/2026\/01\/13\/100000-n8n-instances-exposed-to-internet-vulnerable-to-rce-attacks\/"},"modified":"2026-01-13T10:04:12","modified_gmt":"2026-01-13T10:04:12","slug":"100000-n8n-instances-exposed-to-internet-vulnerable-to-rce-attacks","status":"publish","type":"post","link":"https:\/\/serisec.com\/index.php\/2026\/01\/13\/100000-n8n-instances-exposed-to-internet-vulnerable-to-rce-attacks\/","title":{"rendered":"100,000+ n8n Instances Exposed to Internet Vulnerable to RCE Attacks"},"content":{"rendered":"<p>    100,000+ n8n Instances Exposed to Internet Vulnerable to RCE Attacks<br \/>\n \t<BR><br \/>\n<BR><\/BR><br \/>\n    <!-- no image --><br \/>\n \t<BR><br \/>\n<BR><\/BR><\/p>\n<div>\n<p>A critical vulnerability affecting the popular <a href=\"https:\/\/cybersecuritynews.com\/critical-n8n-rce-vulnerability\/\" target=\"_blank\" rel=\"noreferrer noopener\">n8n<\/a> workflow automation platform has put over 100,000 internet-exposed instances at severe risk.<\/p>\n<p>Security researchers from The Shadowserver Foundation discovered that 105,753 unique n8n instances are vulnerable to remote code execution (RCE) attacks through <a href=\"https:\/\/cybersecuritynews.com\/ni8mare-hijack-n8n-servers\/\" target=\"_blank\" rel=\"noreferrer noopener\">CVE-2026-21858<\/a>.<\/p>\n<p>n8n is a workflow automation platform that connects various applications, services, and databases. Organizations use it to automate business processes, <a href=\"https:\/\/cybersecuritynews.com\/claude-ai-indirect-prompt-attack\/\" target=\"_blank\" rel=\"noreferrer noopener\">integrate APIs<\/a>, and manage data flows across their systems.<\/p>\n<p>The platform has gained significant adoption among enterprises and startups for its flexibility and ease of use.<\/p>\n<figure class=\"wp-block-table is-style-stripes\">\n<table class=\"has-fixed-layout\">\n<thead>\n<tr>\n<th>CVE ID<\/th>\n<th>CVSS Score<\/th>\n<th>Affected Product<\/th>\n<th>Vulnerability Type<\/th>\n<th>Impact<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>CVE-2026-21858<\/td>\n<td>10.0<\/td>\n<td>n8n Workflow Automation<\/td>\n<td>Remote Code Execution (RCE)<\/td>\n<td>Full instance takeover, data exposure<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<h2 class=\"wp-block-heading\" id=\"h-the-vulnerability-explained\"><strong>The Vulnerability Explained<\/strong><\/h2>\n<p>CVE-2026-21858 has a CVSS score of 10.0, making it a critical threat. The flaw stems from a content-type confusion issue in n8n\u2019s <a href=\"https:\/\/cybersecuritynews.com\/how-expired-domains-threaten-online-privacy-a-hidden-security-gap\/\" target=\"_blank\" rel=\"noreferrer noopener\">webhook handling.<\/a><\/p>\n<p>Attackers can send specially crafted HTTP requests with manipulated headers to exploit this weakness.<\/p>\n<p>The vulnerability allows unauthenticated attackers to execute arbitrary code on affected servers, read sensitive system files, extract stored credentials and secrets, forge administrator sessions, and ultimately achieve full instance takeover.<\/p>\n<p>No authentication is required, meaning anyone can exploit this vulnerability without any user interaction. The Shadowserver Foundation\u2019s scan conducted on January 9, 2026, <a href=\"https:\/\/x.com\/Shadowserver\/status\/2010082651450044532\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">identified<\/a> alarming numbers.<\/p>\n<figure class=\"wp-block-embed is-type-rich is-provider-twitter wp-block-embed-twitter\">\n<div class=\"wp-block-embed__wrapper\">\n<div class=\"embed-twitter\">\n<blockquote class=\"twitter-tweet\" data-width=\"550\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">Scan results for n8n CVE-2026-21858 (CVSS 10.0 RCE) for 2026-01-09: 105,753 vulnerable instances by unique IP found \u2013 out of 230,562 IPs with n8n  we see that day. <\/p>\n<p>Dashboard Tree Map view: <a href=\"https:\/\/t.co\/L67BdFnBX6\">https:\/\/t.co\/L67BdFnBX6<\/a><\/p>\n<p>IP data in Vulnerable HTTP reports: <a href=\"https:\/\/t.co\/qxv0Gv6cAK\">https:\/\/t.co\/qxv0Gv6cAK<\/a> <a href=\"https:\/\/t.co\/MhrRuPO10R\">pic.twitter.com\/MhrRuPO10R<\/a><\/p>\n<p>\u2014 The Shadowserver Foundation (@Shadowserver) <a href=\"https:\/\/twitter.com\/Shadowserver\/status\/2010082651450044532?ref_src=twsrc%5Etfw\">January 10, 2026<\/a>\n<\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script>\n<\/div>\n<\/div>\n<\/figure>\n<p>Out of 230,562 IP addresses running n8n, approximately 105,753 instances were found to be vulnerable. This represents nearly 46 percent of exposed n8n deployments.<\/p>\n<p>The vulnerability primarily affects n8n versions 1.65.0 through 1.120.x. Systems that have not been patched remain at immediate risk.<\/p>\n<p>Organizations running n8n must immediately upgrade to version 1.121.0 or later, as it includes the <a href=\"https:\/\/cybersecuritynews.com\/windows-11-24h2-security-update-2\/\" target=\"_blank\" rel=\"noreferrer noopener\">security patch.<\/a><\/p>\n<p>The vulnerability is particularly dangerous because <a href=\"https:\/\/cybersecuritynews.com\/webrat-malware-via-github-repositories\/\" target=\"_blank\" rel=\"noreferrer noopener\">proof-of-concept<\/a> exploits are publicly available, and attackers actively scan for vulnerable instances.<\/p>\n<p>Internet-exposed n8n deployments are prime targets, as attackers can exploit the vulnerability to gain access to connected databases, APIs, and third-party services used by workflows, potentially leading to widespread <a href=\"https:\/\/cybersecuritynews.com\/how-companies-prevent-payroll-data-breaches\/\" target=\"_blank\" rel=\"noreferrer noopener\">data breaches<\/a>.<\/p>\n<p>Organizations should prioritize updating n8n installations immediately. Restrict network access using firewalls. Monitor logs for suspicious webhook requests. Review connected integrations and credentials.<\/p>\n<p>Consider using a <a href=\"https:\/\/cybersecuritynews.com\/fake-fortinet-sites\/\" target=\"_blank\" rel=\"noreferrer noopener\">VPN<\/a> or a private network instead of exposing your network to the internet. The n8n community and security researchers continue monitoring the threat landscape to identify additional vulnerable instances.<\/p>\n<p class=\"has-text-align-center has-background\" style=\"background:linear-gradient(180deg,rgb(238,238,238) 94%,rgb(169,184,195) 100%)\"><strong>Follow us on <a href=\"https:\/\/news.google.com\/publications\/CAAqMggKIixDQklTR3dnTWFoY0tGV041WW1WeWMyVmpkWEpwZEhsdVpYZHpMbU52YlNnQVAB?hl=en-IN&amp;gl=IN&amp;ceid=IN:en\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Google News<\/a>, <a href=\"https:\/\/www.linkedin.com\/company\/cybersecurity-news\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">LinkedIn<\/a>, and <a href=\"https:\/\/x.com\/cyber_press_org\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">X<\/a> for daily cybersecurity updates. <a href=\"https:\/\/cybersecuritynews.com\/contact-us\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Contact us<\/a> to feature your stories.<\/strong><\/p>\n<p>The post <a href=\"https:\/\/cybersecuritynews.com\/100000-n8n-instances-exposed\/\">100,000+ n8n Instances Exposed to Internet Vulnerable to RCE Attacks<\/a> appeared first on <a href=\"https:\/\/cybersecuritynews.com\/\">Cyber Security News<\/a>.<\/p>\n<\/div>\n<p> \t<BR><br \/>\n <BR><\/BR><br \/>\n    Abinaya<br \/>\n \t<BR><br \/>\n<BR><\/BR><br \/>\n<a href=\"https:\/\/cybersecuritynews.com\/100000-n8n-instances-exposed\/\">Go to cyber-security-news<\/a><br \/>\n \t<BR><br \/>\n <BR><\/BR><\/p>\n","protected":false},"excerpt":{"rendered":"<p>100,000+ n8n Instances Exposed to Internet Vulnerable to RCE Attacks A critical vulnerability affecting the popular n8n workflow automation platform has put over 100,000 internet-exposed instances at severe risk. Security researchers from The Shadowserver Foundation discovered that 105,753 unique n8n instances are vulnerable to remote code execution (RCE) attacks through CVE-2026-21858. n8n is a workflow [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[129,63,648],"tags":[130],"class_list":["post-9836","post","type-post","status-publish","format-standard","hentry","category-cyber-security","category-cyber-security-news","category-vulnerability-news","tag-cyber-security-news"],"_links":{"self":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts\/9836"}],"collection":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/comments?post=9836"}],"version-history":[{"count":0,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts\/9836\/revisions"}],"wp:attachment":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/media?parent=9836"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/categories?post=9836"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/tags?post=9836"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}