n8n versions before 1.123.64, 2.29.8, and 2.30.1 contain a privilege escalation vulnerability in Enterprise SSO instance-role provisioning.
CVE-2026-65016 · GHSA-mwq7-vcmc-cm4q · GHSA-35q8-9mj6-wjmf · EUVD-2026-47632 · published 22 Jul 2026
How serious is it
- Severity: high, CVSS score 7.7 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-65016?
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Who is affected
- n8n-io n8n: 2.0.0-rc.0 <2.29.8
- n8n-io n8n: 0 <1.123.64
- n8n-io n8n: 2.30.0 <2.30.1
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
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.
Check your whole app
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References
- github.com/n8n-io/n8n/security/advisories/GHSA-35q8-9mj6-wjmf
- www.vulncheck.com/advisories/n8n-before-privilege-escalation-via-sso-instance-role
Merged from ENISA EUVD. Last updated 30 Oct 2026. All vulnerabilities · RSS · JSON