WS-2026-0096
Published:September 30, 2026
Updated:October 07, 2026
n8n waiting-webhook endpoint accepted a Send-and-Wait node reference in a second form and selected the validation before normalising it, so an approval could be submitted without the required HMAC signature. A caller holding an execution's resume token can release an approval intended for someone else. Affects n8n 2.14.0 to 2.41.3 and 2.42.0; fixed in 2.41.4 and 2.42.1.
Affected Packages
https://github.com/n8n-io/n8n.git (GITHUB):
Affected version(s) >=n8n@2.14.0 <n8n@2.41.4Fix Suggestion:
Update to version n8n@2.41.4https://github.com/n8n-io/n8n.git (GITHUB):
Affected version(s) =n8n@2.42.0 <n8n@2.42.1Fix Suggestion:
Update to version n8n@2.42.1n8n (NPM):
Affected version(s) >=2.14.0 <2.41.4Fix Suggestion:
Update to version 2.41.4n8n (NPM):
Affected version(s) =2.42.0 <2.42.1Fix Suggestion:
Update to version 2.42.1Related Resources (2)
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Contact UsCVSS v4
Base Score:
7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.2
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Verification of Cryptographic Signature