CVE-2026-59206
Published:July 09, 2026
Updated:August 04, 2026
n8n is an open source workflow automation platform. Prior to 1.123.61, 2.27.4, and, 2.28.1, an authenticated user with the default workflow:create permission could pollute Object.prototype through a crafted workflow saved, updated, or imported via the workflow API, allowing unauthenticated requests to be treated as a privileged user and exposing user and project listing endpoints. This issue is fixed in versions 1.123.61, 2.27.4, and 2.28.1.
Affected Packages
n8n (NPM):
Affected version(s) =2.28.0 <2.28.1Fix Suggestion:
Update to version 2.28.1n8n (NPM):
Affected version(s) >=0.0.1 <1.123.61Fix Suggestion:
Update to version 1.123.61n8n (NPM):
Affected version(s) >=2.0.0 <2.27.4Fix Suggestion:
Update to version 2.27.4n8n (NPM):
Affected version(s) >=2.0.0-rc.0 <2.27.4Fix Suggestion:
Update to version 2.27.4n8n (NPM):
Affected version(s) >=0.0.1 <1.123.61Fix Suggestion:
Update to version 1.123.61Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
EPSS
Base Score:
0.38