---
cve: "CVE-2026-85166"
severity: "HIGH"
cvss: 7.2
epss: "0.2%"
vendor: "n8n-io"
kev: false
exploited: false
published: "2026-09-03 13:06:23"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T16:48:38+02:00"
---

# CVE-2026-85166

> 7.2 HIGH · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- d2ce3c084c228622c2ffe7c245d25870430e18a9 (Commit)
- bc9090e8c61d0dc84aa85528e62142dfb7001243 (Commit)

## Referenzen

- <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>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-85166) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_