CVE-2026-65016 (GCVE-0-2026-65016)

Vulnerability from cvelistv5 – Published: 2026-07-22 11:21 – Updated: 2026-07-24 21:35
VLAI
Title
n8n before 1.123.64, 2.29.8, and 2.30.1 Privilege Escalation via SSO Instance-Role
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.
Severity
7.7 (High)
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
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-23 18:16 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 6759 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
n8n-io n8n Affected: 0 , < 1.123.64 (semver)
Unaffected: 1.123.64 (semver)
guessed Create a notification for this product.
n8n-io n8n Affected: 0 , < 2.30.1 (semver)
Unaffected: 2.30.1 (semver)
guessed Create a notification for this product.
n8n-io n8n Affected: 0 , < 2.29.8 (semver)
Unaffected: 2.29.8 (semver)
guessed Create a notification for this product.
Date Public
2026-07-08 00:00
Credits
ttzero25
Show details on NVD website
To clipboard 

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                "vulnAvailabilityImpact": "HIGH",
                "vulnConfidentialityImpact": "HIGH",
                "vulnIntegrityImpact": "HIGH"
              },
              "format": "CVSS"
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-639",
                  "description": "Authorization Bypass Through User-Controlled Key",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-07-24T21:35:14.139Z",
            "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
            "shortName": "VulnCheck"
          },
          "references": [
            {
              "name": "GitHub Security Advisory (GHSA-35q8-9mj6-wjmf)",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-35q8-9mj6-wjmf"
            },
            {
              "name": "VulnCheck Advisory: n8n before 1.123.64 Privilege Escalation via SSO Instance-Role",
              "tags": [
                "third-party-advisory"
              ],
              "url": "https://www.vulncheck.com/advisories/n8n-before-privilege-escalation-via-sso-instance-role"
            }
          ],
          "title": "n8n before 1.123.64, 2.29.8, and 2.30.1 Privilege Escalation via SSO Instance-Role",
          "x_generator": {
            "engine": "vulncheck-endgame"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "assignerShortName": "VulnCheck",
        "cveId": "CVE-2026-65016",
        "datePublished": "2026-07-22T11:21:38.704Z",
        "dateReserved": "2026-07-21T11:32:54.897Z",
        "dateUpdated": "2026-07-24T21:35:14.139Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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