6.5

CVE-2026-65594

n8n before 2.30.1 Missing OAuth Authorization Check

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
N8n ≫ N8n SwEditioncommunity SwPlatformnode.js Version >= 2.27.0 < 2.29.8
N8n ≫ N8n SwEditionenterprise SwPlatformnode.js Version >= 2.27.0 < 2.29.8
N8n ≫ N8n Version2.30.0 SwEditioncommunity SwPlatformnode.js
N8n ≫ N8n Version2.30.0 SwEditionenterprise SwPlatformnode.js
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.27% 0.188
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 6.5 2.8 3.6
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
disclosure@vulncheck.com 5.1 0 0
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE-863 Incorrect Authorization

The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

https://github.com/n8n-io/n8n/security/advisories/GHSA-q5xf-xhwf-cwqf
Vendor Advisory
Mitigation
https://www.vulncheck.com/advisories/n8n-before-missing-oauth-authorization-check
Third Party Advisory