CVE-2026-65594

Published: Lug 22, 2026 Last Modified: Lug 27, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 5,1
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: low
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A
MEDIUM 6,5
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: low
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: none
Availability: none

Description

AI Translation Available

n8n before 2.29.8 and 2.30.x before 2.30.1 (affected from 2.27.0, when the OAuth 2.1 consent and token-issuance flow was introduced) does not verify that the authenticated user has access to the workflow referenced as the OAuth resource. On instances with at least one active MCP Server Trigger workflow configured with n8n OAuth2 authentication, a member-level user can register an OAuth client, self-approve consent for another user's workflow, and obtain a valid token. The workflow then runs in the owner's project context with the owner's stored credentials, and the attacker can set tool inputs and read outputs (potentially including data from the owner's connected integrations), breaking user and project isolation.

863

Incorrect Authorization

Incomplete
Abstraction: Class Structure: Simple
Common Consequences
Security Scopes Affected:
Confidentiality Integrity Access Control Availability
Potential Impacts:
Read Application Data Read Files Or Directories Modify Application Data Modify Files Or Directories Gain Privileges Or Assume Identity Bypass Protection Mechanism Execute Unauthorized Code Or Commands Dos: Crash, Exit, Or Restart Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Dos: Resource Consumption (Other)
Applicable Platforms
Technologies: Web Server, Database Server, Not Technology-Specific
Likelihood of Exploit: High
View CWE Details
Application

N8N by N8N

Product Information
Vendor N8N
Product N8N
Version 2.30.0
cpe:2.3:a:n8n:n8n:2.30.0:*:*:*:enterprise:node.js:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

N8N by N8N

Product Information
Vendor N8N
Product N8N
Version Range Affected
From 2.27.0 (inclusive)
To 2.29.8 (exclusive)
cpe:2.3:a:n8n:n8n:*:*:*:*:enterprise:node.js:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

N8N by N8N

Product Information
Vendor N8N
Product N8N
Version Range Affected
From 2.27.0 (inclusive)
To 2.29.8 (exclusive)
cpe:2.3:a:n8n:n8n:*:*:*:*:community:node.js:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

N8N by N8N

Product Information
Vendor N8N
Product N8N
Version 2.30.0
cpe:2.3:a:n8n:n8n:2.30.0:*:*:*:community:node.js:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://github.com/n8n-io/n8n/security/advisories/GHSA-q5xf…
https://github.com/n8n-io/n8n/security/advisories/GHSA-q5xf-xhwf-cwqf
https://www.vulncheck.com/advisories/n8n-before-missing-oau…
https://www.vulncheck.com/advisories/n8n-before-missing-oauth-authorization-che…