---
cve: "CVE-2026-59208"
severity: "HIGH"
cvss: 7.6
epss: "31%"
vendor: "n8n-io"
kev: false
exploited: false
published: "2026-07-09 15:27:28"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T10:56:26+02:00"
---

# CVE-2026-59208

> 7.6 HIGH · 🧪 PoC

## Beschreibung

n8n is an open source workflow automation platform. Prior to 2.27.4 and from 2.28.0 prior to 2.28.1, n8n instances configured with more than one trusted token-exchange issuer resolved external identities to local accounts using only the JWT sub claim and ignored the iss claim, allowing an attacker with a valid token from one trusted issuer and a sub matching a victim under another issuer to authenticate as that victim. This issue is fixed in versions 2.27.4 and 2.28.1.

## CVSS-Vektor

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

- a4d0dfce294064026be1a6a246e6da348fea1485 (Commit)

## Referenzen

- <https://github.com/n8n-io/n8n/security/advisories/GHSA-mq3m-f8x3-579w>
- <https://github.com/n8n-io/n8n/releases/tag/n8n%402.27.4>
- <https://github.com/n8n-io/n8n/releases/tag/n8n%402.28.1>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-59208) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_