| Component | n8n |
| Severity | high (CVSS 8.8) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Published (NVD) | 2026-08-20 |
| Last modified | 2026-09-01 |
| Affected versions | n8n >= 2.33.0, < 2.33.4 n8n = 2.34.0 |
| Fixed in | 2.33.4 |
| Weakness | CWE-22 |
| CISA KEV | not listed |
NVD 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.
What to do
- Upgrade n8n to
2.33.4or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-77068
- https://github.com/n8n-io/n8n/security/advisories/GHSA-6h4x-896x-fw5m
- https://www.vulncheck.com/advisories/n8n-before-remote-code-execution-via-path-traversal
Read more
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