n8n vulnerabilities

A vulnerability in n8n before versions 1.123.55, 2.25.7, and 2.26.2 involves incorrect authorization in three mutating evaluation test-run endpoints. These endpoints use the workflow:read scope instead of the appropriate workflow:execute scope for state-changing actions.

A vulnerability in n8n before versions 1.123.18 and 2.6.2 fails to verify HMAC-SHA256 signatures on Zendesk webhooks in the ZendeskTrigger node. Attackers who know the webhook URL can send unsigned POST requests to trigger workflows with arbitrary malicious data.

A cross-site scripting vulnerability exists in n8n before version 2.8.0 within the credential management flow. Authenticated users can inject malicious JavaScript URLs into the OAuth2 credential Authorization URL field. Attackers can craft malicious credentials and trick victims into clicking the OAuth authorization button, executing arbitrary scripts in the victim's browser with their privileges.

The Execute Command node in n8n allows authenticated users to execute arbitrary commands on the host system where n8n runs. Attackers with user access or compromised credentials can exploit this node to run malicious commands, potentially leading to data exfiltration, service disruption, or complete system compromise.

A vulnerability in n8n before version 2.25.7 and 2.26.x before 2.26.2 allows bypassing the AST security validator in the Python Code node. An authenticated user with permission to create or modify workflows containing this node can access the task executor module namespace.

n8n contains a stored XSS vulnerability in the Chat Trigger node's Custom CSS field due to a misconfiguration of the sanitize-html library. An authenticated user with permission to create or modify workflows can inject JavaScript that bypasses sanitization, resulting in stored XSS against any user who visits the public chat page.

An authentication bypass vulnerability in n8n before version 2.8.0 allows authenticated SSO users to disable SSO enforcement via the API. Attackers can create local password credentials to authenticate directly, bypassing organizational SSO policies and identity-provider-enforced multi-factor authentication.

n8n is an open source workflow automation platform. Prior to version 2.24.0, an authenticated user with workflow edit access could supply a malicious filter value in the MongoDB node's Find And Replace operation, leading to unintended documents being matched and overwritten with attacker-controlled content.

n8n is a workflow automation platform that prior to version 2.24.0 allowed authenticated users with permissions to create or modify workflows to achieve global prototype pollution via the Microsoft SQL node by supplying a crafted value as the table parameter.