PT-2026-63346 · N8N Io · N8N

Ttzero25 · CVE-2026-65016 · Published 2026-07-22 · Updated 2026-07-22

Mitre

CVSS v4.0

7.7

High

Base vector

AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

n8n versions before 1.123.64, 2.29.8, and 2.30.1 contain a privilege escalation vulnerability in Enterprise SSO instance-role provisioning. The provisioning path maps an IdP-asserted role claim to an n8n global role but does not prevent assignment of the global:owner role (unlike the token-exchange identity path, which rejects it). An SSO-authenticated user whose instance-role claim resolves to global:owner is provisioned as instance owner, gaining full administrative control over workflows, credentials, users, and instance configuration. Exploitation requires that Enterprise SSO is configured, instance-role provisioning is enabled via N8N SSO SCOPES PROVISION INSTANCE ROLE (disabled by default), and the attacker controls the instance-role claim value issued by the IdP.

Fix

IDOR

Weakness Enumeration

CWE-639

Related Identifiers

CVE-2026-65016

Affected Products

N8N

References · 3

• https://github.com/n8n-io/n8n/security/advisories/GHSA-35q8-9mj6-wjmf · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-65016 · Security Note
• https://vulncheck.com/advisories/n8n-before-privilege-escalation-via-sso-instance-role · Note