| Component | n8n |
| Severity | medium (CVSS 6.5) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| Published (NVD) | 2026-09-03 |
| Last modified | 2026-09-10 |
| Affected versions | n8n < 2.35.4 n8n >= 2.36.0, < 2.36.2 |
| Fixed in | 2.35.4, 2.36.2 |
| Weakness | CWE-863 |
| CISA KEV | not listed |
NVD description
n8n before 2.35.4 and 2.36.x before 2.36.2 does not validate credential references in the inline workflow JSON of nodes that execute an inline sub-workflow (e.g., the Workflow Tool node). A shared-workflow editor, or any user creating/updating a workflow via the REST API, Public API, or MCP, can persist a node referencing a credential they do not own. When the workflow is later executed under an identity that holds the credential, the inline sub-workflow resolves the secret and can send it to an attacker-controlled endpoint, resulting in credential exfiltration.
What to do
- Upgrade n8n to
2.35.4or later (or the patched release of your branch: 2.36.2). - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-85166
- https://github.com/n8n-io/n8n/security/advisories/GHSA-4r56-g65c-fm83
- https://www.vulncheck.com/advisories/n8n-before-2.36.2-credential-exfiltration-via-workflow-tool-node
Read more
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