---
cve: "CVE-2026-86076"
severity: "HIGH"
cvss: 8.7
epss: "0.4%"
vendor: "n8n-io"
kev: false
exploited: false
published: "2026-09-08 22:19:16"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T16:01:05+02:00"
---

# CVE-2026-86076

> 8.7 HIGH · 🧪 PoC

## Beschreibung

n8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the expression compiler sanitizer resolved through dynamically scoped this and did not reject reserved class member names. A class field named __sanitize could rebind the sanitizer and reach the Function constructor, enabling backend code execution and editor-preview JavaScript execution. The affected AST hook is PrototypeSanitizer in packages/workflow/src/expression-sandboxing.ts. This issue is fixed in versions 1.123.76, 2.37.7 and 2.38.2.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:N/SA:N
```

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

## Patch verfügbar (OSV)

- cbee391326797c19a2593934063311fed6131e07 (Commit)
- 2a4ca7868dc75edca4c575d6507021e1e6b0ec90 (Commit)

## Referenzen

- <https://github.com/n8n-io/n8n/security/advisories/GHSA-hw8v-xxg5-vvvx>
- <https://github.com/n8n-io/n8n/releases/tag/n8n@1.123.76>
- <https://github.com/n8n-io/n8n/releases/tag/n8n@2.37.7>
- <https://github.com/n8n-io/n8n/releases/tag/n8n@2.38.2>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-86076) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_