---
cve: "CVE-2026-65591"
severity: "HIGH"
cvss: 8.9
epss: "0.5%"
vendor: "n8n-io"
kev: false
exploited: false
published: "2026-07-22 12:18:19"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T06:06:31+02:00"
---

# CVE-2026-65591

> 8.9 HIGH · 🧪 PoC

## Beschreibung

n8n contains a sanitizer bypass vulnerability in the legacy expression evaluator's computed-member handler. An authenticated user with workflow create or modify permissions can craft a malicious expression to bypass the sanitizer and achieve host-level code execution as the n8n process. The legacy expression engine is the default in affected versions. Fixed in n8n 1.123.64, 2.29.8, and 2.30.1.

## CVSS-Vektor

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

- 25d74f918253845e2ad25eb824238b49d0d8a30c (Commit)
- 7786117e976664b67288f13d6cfcd1fcf1b1289b (Commit)

## Referenzen

- <https://github.com/n8n-io/n8n/security/advisories/GHSA-pm35-fqvh-cq5g>
- <https://www.vulncheck.com/advisories/n8n-before-sanitizer-bypass-remote-code-execution>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-65591) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_