---
cve: "CVE-2026-86083"
severity: "HIGH"
cvss: 7.7
epss: "36%"
vendor: "n8n-io"
kev: false
exploited: false
published: "2026-09-08 22:19:17"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T03:48:44+02:00"
---

# CVE-2026-86083

> 7.7 HIGH · 🧪 PoC

## Beschreibung

n8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the legacy expression engine generated source text by calling the mutable global JSON.stringify while printing synthetic string literals and interpolating timezone data. An expression could replace JSON.stringify and cause later generated source to contain executable attacker-controlled code. The affected code-generation paths include packages/@n8n/expression-runtime/src/bridge/isolated-vm-bridge.ts and packages/@n8n/tournament/src/ExpressionBuilder.ts, and the issue does not affect the vm expression engine. 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:N/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-6xcw-7xm6-48c6>
- <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-2026-86083) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_