Expression Evaluation Exploit in n8n Workflow Automation Platform

CVE-2026-27577

What is CVE-2026-27577?

CVE-2026-27577 is a security vulnerability identified in the n8n workflow automation platform, which is an open-source tool designed to automate various tasks and integrate different applications. This vulnerability arises from issues in the expression evaluation system within n8n, allowing an authenticated user to create and modify workflows. If exploited, it could enable the execution of unauthorized system commands on the host that runs n8n, posing a significant risk to the integrity and security of the system. Organizations relying on n8n for process automation must recognize the potential for this risk, particularly if users with workflow creation privileges do not adhere to stringent security protocols.

Potential impact of CVE-2026-27577

1. Unauthorized Command Execution: The primary concern surrounding this vulnerability is the potential for an attacker to execute arbitrary commands on the host machine, which could lead to complete system compromise, data loss, or further exploitation within the network.

2. Access Control Breach: Since the vulnerability can be manipulated by authenticated users with workflow editing permissions, there is a chance for privilege escalation or misuse of access controls, potentially allowing malicious actions to go undetected.

3. Integration and Data Integrity Risks: Compromised workflows can lead to erroneous data processing or loss of data integrity, disrupting business operations that depend on accurate and reliable automation. This could have downstream effects on trust in the automated processes and overall operational efficiency.

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