CVE-2026-103257: n8n before 1.123.80, 2.39.6, and 2.40.1 Path Traversal via n8n Node

Severity: high (CVSS 7.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-01 · updated 2026-10-01
Weakness: CWE-22

Description

n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1 contain a path traversal vulnerability in the n8n node that fails to validate resource identifiers. Attackers can craft malicious resource IDs to redirect API calls to unintended resources, allowing unauthorized access to workflows, executions, and credential secrets within the API key's scope.

Affected products

n8n-io n8n: before 1.123.80; from 2.0.0 before 2.39.6; from 2.40.0 before 2.40.1 — fixed in 1.123.80, 2.39.6, 2.40.1

How to fix

Upgrade to a fixed version: n8n-io n8n 1.123.80, 2.39.6, 2.40.1. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2026-103257 or the next vulnerability affects your stack