CVE-2026-59206

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.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/n8n-io/n8n/releases/tag/n8n%402.27.4	Release Notes
https://github.com/n8n-io/n8n/releases/tag/n8n%402.28.1	Release Notes
https://github.com/n8n-io/n8n/security/advisories/GHSA-75qm-gp28-rcq9	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:n8n:n8n::::::node.js::*
	cpe:2.3:a:n8n:n8n::::::node.js::*
	cpe:2.3:a:n8n:n8n:2.28.0:::::node.js::

History

No history.

Information

Published : 2026-07-09 16:16

Updated : 2026-07-09 19:41

NVD link : CVE-2026-59206

Mitre link : CVE-2026-59206

CVE.ORG link : CVE-2026-59206

JSON object : View

Products Affected

n8n

n8n

CWE

CWE-1321

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

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