CVE-2026-77068

High

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.

SeverityHigh

CVSS8.8

Exploit probability61. percentile0.9%

Product

N8n

PublishedAug 20, 2026

First seenAug 20, 2026

Weakness typeCWE-22Path traversal

How to fix

Update

n8n n8n2.33.4 or later

Vendor advisories

github.com/n8n-io/n8n/security/advisories/GHSA-6h4x-896x-fw5m

Affected products

Product	Affected versions	Fixed in
n8n n8n	2.33.0 ≤ v < 2.33.4, 2.34.0	2.33.4

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