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CVE-2026-77079 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:8.8 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/n8n-io/n8n/security/advisories/GHSA-xhmh-8fgr-xqhj	[email protected]	MitigationVendor Advisory
https://www.vulncheck.com/advisories/n8n-before-authorization-bypass-via-custom-role-deletion	[email protected]	Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-639	Authorization Bypass Through User-Controlled Key	[email protected]

Affected Products

Product	Versions
n8n n8n	< 2.33.4 2.34.0
CPE cpe:2.3:a:n8n:n8n::::::node.js::* cpe:2.3:a:n8n:n8n:2.34.0:::::node.js:: Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Sep 1, 2026	Initial Analysis	[email protected]
Aug 25, 2026	CVE Modified	CISA-ADP
Aug 21, 2026	CVE Modified	[email protected]
Aug 20, 2026	New CVE Received	[email protected]