---
cve: "CVE-2026-86075"
severity: "HIGH"
cvss: 8.7
epss: "0.3%"
vendor: "n8n-io"
kev: false
exploited: false
published: "2026-09-08 22:19:16"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T08:55:36+02:00"
---

# CVE-2026-86075

> 8.7 HIGH · 🧪 PoC

## Beschreibung

n8n is an open source workflow automation platform. Prior to 2.37.7 and 2.38.2, the OAuth Dynamic Client Registration endpoint bounded redirect_uris but accepted arbitrarily large client_name and grant_types values. An unauthenticated remote caller could repeatedly persist oversized values in oauth_clients and exhaust database storage. The affected validation is in packages/cli/src/modules/oauth-server/oauth-server.service.ts, including MAX_CLIENT_NAME_LENGTH and MAX_GRANT_TYPES. This issue is fixed in versions 2.37.7 and 2.38.2.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 2a4ca7868dc75edca4c575d6507021e1e6b0ec90 (Commit)
- 7bd63f41c2f1f2bc2576c0728dbe2e68ed61e0f1 (Commit)

## Referenzen

- <https://github.com/n8n-io/n8n/security/advisories/GHSA-hh89-3r9w-qj3j>
- <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-2026-86075) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_