CVE-2026-65016 json
n8n before 1.123.64, 2.29.8, and 2.30.1 Privilege Escalation via SSO Instance-Role
published 2026-07-22 3 mo ago modified 2026-10-29 10 d ago also GHSA-35q8-9mj6-wjmf , EUVD-2026-47632
- cvss
- 8.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 39%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- npm n8n 1.123.64, 2.29.8, 2.30.1
- n8n-io n8n 1.123.64, 2.29.8, 2.30.1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 3 mo ago
Exploit prediction
0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.7 | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| CNA | 4.0 | 7.7 | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/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 |
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | n8n | <1.123.64 >=2.30.0, <2.30.1 >=2.0.0-rc.0, <2.29.8 |
1.123.64 2.30.1 2.29.8 |
Affected products
- n8n-io n8n
Classification
- Weakness
-
- CWE-639 Authorization Bypass Through User-Controlled Key
References
-
github.com
/n8n-io/n8n/security/advisories/GHSA-35q8-9mj6-wjmf
vendor-advisory, web, mitigation
-
vulncheck.com
/advisories/n8n-before-privilege-escalation-via-sso-instance-role
third-party-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-65016
advisory
-
github.com
/n8n-io/n8n
package
-
github.com
/n8n-io/n8n/releases/tag/n8n@1.123.64
web
-
github.com
/n8n-io/n8n/releases/tag/n8n@2.29.8
web
-
github.com
/n8n-io/n8n/releases/tag/n8n@2.30.1
web
Sources
- CVE List CVE-2026-65016
- GitHub Advisory GHSA-35q8-9mj6-wjmf
- NVD CVE-2026-65016
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