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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 3
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
N8n N8n
cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*
|
— |
1.123.80
|
|
N8n N8n
cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*
|
2.0.0
|
2.39.6
|
|
N8n N8n
cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*
|
2.40.0
|
2.40.1
|