Description
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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
n8n-io n8n
Default version status: unaffected
0 to < 1.123.64affected1.123.64unaffected
pkg:npm/n8nn8n-io n8n
Default version status: unaffected
2.30.0 to < 2.30.1affected2.30.1unaffected
pkg:npm/n8nn8n-io n8n
Default version status: unaffected
2.0.0-rc.0 to < 2.29.8affected2.29.8unaffected
pkg:npm/n8n