---
cve: "CVE-2026-77079"
severity: "HIGH"
cvss: 7.4
epss: "0.2%"
vendor: "n8n-io"
kev: false
exploited: false
published: "2026-08-20 12:16:39"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T08:11:45+02:00"
---

# CVE-2026-77079

> 7.4 HIGH · 🧪 PoC

## Beschreibung

n8n before 2.34.1 and 2.33.4 contains an authorization bypass in the custom project role deletion (reassignment) path. When deleting a custom project role with a reassignment target, the code validated only that the target role existed and was project-scoped, performing no project-level authorization check. A user holding only the narrow role:manageProject global scope could delete any custom project role in use on the instance and reassign its holders (including themselves) to the built-in project:admin role, gaining full administrative control of projects they had no legitimate access to.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- e2279d07cdc8d1aeee42607a15365ccfa98f8b27 (Commit)
- 14c9aef0552fb4776501ca1c4589451891dd0ef4 (Commit)

## Referenzen

- <https://github.com/n8n-io/n8n/security/advisories/GHSA-xhmh-8fgr-xqhj>
- <https://www.vulncheck.com/advisories/n8n-before-authorization-bypass-via-custom-role-deletion>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-77079) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_