CVE-2026-103254: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in n8n-io n8n
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.
AI Analysis
Technical Summary
CVE-2026-103254 is a path traversal vulnerability in n8n's signed resume URL generation mechanism for Send-and-Wait approvals. The vulnerability arises because unresolved traversal sequences in caller-controlled node IDs allow an attacker with workflow creation permissions to craft valid approval URLs for gates in unauthorized projects. This enables cross-project approval forgery, potentially bypassing intended access controls. The affected versions are n8n before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1.
Potential Impact
An attacker with workflow creation permissions can forge approval URLs for projects they should not access, potentially allowing unauthorized approval actions across projects. This could lead to unauthorized workflow executions or approvals, undermining project isolation and approval integrity.
Mitigation Recommendations
A fix is available in n8n versions 1.123.80, 2.39.6, and 2.40.1 and later. Users should upgrade to these versions or later to remediate this vulnerability. No additional mitigation steps are indicated.
CVE-2026-103254: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in n8n-io n8n
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.
CVSS v4.0
Score 7.0high
Affected software
n8n-io
n8n
pkg:npm/n8n-io/n8nRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-103254 is a path traversal vulnerability in n8n's signed resume URL generation mechanism for Send-and-Wait approvals. The vulnerability arises because unresolved traversal sequences in caller-controlled node IDs allow an attacker with workflow creation permissions to craft valid approval URLs for gates in unauthorized projects. This enables cross-project approval forgery, potentially bypassing intended access controls. The affected versions are n8n before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1.
Potential Impact
An attacker with workflow creation permissions can forge approval URLs for projects they should not access, potentially allowing unauthorized approval actions across projects. This could lead to unauthorized workflow executions or approvals, undermining project isolation and approval integrity.
Mitigation Recommendations
A fix is available in n8n versions 1.123.80, 2.39.6, and 2.40.1 and later. Users should upgrade to these versions or later to remediate this vulnerability. No additional mitigation steps are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-30T10:55:39.868Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6abe7492a43b0b3b89bd1ce3
Added to database: 10/01/2026, 14:56:18 UTC
Last enriched: 10/01/2026, 15:22:19 UTC
Last updated: 10/01/2026, 19:41:32 UTC
Views: 6
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