CVE-2026-77068: n8n before 2.34.1 Remote Code Execution via Path Traversal

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-20 · updated 2026-09-01
Weakness: CWE-22

Description

n8n before 2.33.4 and 2.34.x before 2.34.1 contain a remote code execution vulnerability in the @n8n/workflow-sdk node-schema loader used for MCP node-schema loading. The loader derives a node's schema module path directly from the attacker-supplied node type string without validating path-traversal sequences. An authenticated user with global:member privileges can reference malicious files via path traversal, causing code execution in the n8n main process.

Affected products

n8n-io n8n: from 2.33.0 before 2.33.4; 2.34.0 — fixed in 2.33.4

How to fix

Upgrade to a fixed version: n8n-io n8n 2.33.4. Check the vendor advisory for mitigations.

References

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