CVE-2026-103254

Medium

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 signed resume URL generation for Send-and-Wait approvals. Attackers with workflow creation permissions can mint valid approval URLs for gates in projects they cannot access by exploiting unresolved traversal sequences in caller-controlled node IDs, enabling cross-project approval forgery.

SeverityMedium

CVSS6.3

Exploit probability—

ProductN8n

PublishedOct 1, 2026

First seenOct 1, 2026

Weakness typeCWE-22Path traversal

How to fix

Update

n8n-io n8n1.123.80, 2.39.6, 2.40.1 or later

Vendor advisories

github.com/n8n-io/n8n/security/advisories/GHSA-597w-c3jh-g8fg

Affected products

Product	Affected versions	Fixed in
n8n-io n8n	v < 1.123.80, 2.0.0 ≤ v < 2.39.6, 2.40.0 ≤ v < 2.40.1	1.123.80, 2.39.6, 2.40.1

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