CVE-2026-77079

n8n before 2.34.1 and 2.33.4 contains an authorization bypass in the custom project role deletion (reassignment) path. When deleting a custom project role with a reassignment target, the code validated only that the target role existed and was project-scoped, performing no project-level authorization check. A user holding only the narrow role:manageProject global scope could delete any custom project role in use on the instance and reassign its holders (including themselves) to the built-in project:admin role, gaining full administrative control of projects they had no legitimate access to.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/n8n-io/n8n/security/advisories/GHSA-xhmh-8fgr-xqhj	Mitigation Vendor Advisory
https://www.vulncheck.com/advisories/n8n-before-authorization-bypass-via-custom-role-deletion	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:n8n:n8n::::::node.js::*
	cpe:2.3:a:n8n:n8n:2.34.0:::::node.js::

History

No history.

Information

Published : 2026-08-20 12:16

Updated : 2026-09-01 19:45

NVD link : CVE-2026-77079

Mitre link : CVE-2026-77079

CVE.ORG link : CVE-2026-77079

JSON object : View

Products Affected

n8n

n8n

CWE

CWE-639

Authorization Bypass Through User-Controlled Key

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