Critical n8n Workflow Automation Platform Vulnerabilities Enable Remote Code Execution

Multiple critical vulnerabilities have been disclosed in the open-source workflow automation platform n8n, exposing both self-hosted and cloud deployments to severe security risks. The most severe flaw, tracked as CVE-2026-21877, allows authenticated attackers to execute arbitrary code on affected instances, potentially granting full control over the system. This vulnerability impacts a wide range of n8n installations, and while patches have been released, unpatched systems remain at risk. Another critical flaw, CVE-2026-21858, has also been highlighted, with reports indicating that over 100,000 servers could be exposed due to the public release of exploit code.

Security researchers have emphasized the urgency of applying available patches to mitigate these threats, as the public availability of exploits significantly increases the likelihood of widespread attacks. Organizations using n8n are strongly advised to update their deployments immediately and review their exposure, especially if instances are accessible from the internet. The vulnerabilities underscore the importance of timely patch management and monitoring for signs of compromise in automation and integration platforms.