CVE-2026-85166
n8n before 2.36.2 Credential Exfiltration via Workflow Tool Node
- State
- Published
- Severity
- 7.2 High
- Published
- Sep 3, 2026
- Updated
- Oct 29, 2026
- Reserved
- Sep 3, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.2 High | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:L | VulnCheck |
Weaknesses
- CWE-863 Incorrect Authorization
Affected Products
| Product | Versions |
|---|---|
n8nn8n-io |
|
n8nn8n-io |
|
References
- GitHub Security Advisory (GHSA-4r56-g65c-fm83)vendor-advisory
- VulnCheck Advisory: n8n before 2.36.2 Credential Exfiltration via Workflow Tool Nodethird-party-advisory
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