CVE-2026-59208

n8n is an open source workflow automation platform. Prior to 2.27.4 and from 2.28.0 prior to 2.28.1, n8n instances configured with more than one trusted token-exchange issuer resolved external identities to local accounts using only the JWT sub claim and ignored the iss claim, allowing an attacker with a valid token from one trusted issuer and a sub matching a victim under another issuer to authenticate as that victim. This issue is fixed in versions 2.27.4 and 2.28.1.

CVSS v3 6.8 MEDIUM

6.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

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-mq3m-f8x3-579w	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	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 : 2026-07-14 01:16

NVD link : CVE-2026-59208

Mitre link : CVE-2026-59208

CVE.ORG link : CVE-2026-59208

JSON object : View

Products Affected

n8n

n8n

CWE

CWE-287

Improper Authentication

CWE-346

Origin Validation Error

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