---
cve: "CVE-2026-103254"
severity: "HIGH"
cvss: 7.0
epss: ""
vendor: "n8n-io"
kev: false
exploited: false
published: "2026-10-01 11:17:19"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-10-03T11:48:11+02:00"
---

# CVE-2026-103254

> 7.0 HIGH · 🧪 PoC

## Beschreibung

n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1 contain a path traversal vulnerability in signed resume URL generation for Send-and-Wait approvals. Attackers with workflow creation permissions can mint valid approval URLs for gates in projects they cannot access by exploiting unresolved traversal sequences in caller-controlled node IDs, enabling cross-project approval forgery.

## CNA-Record (Kanon, cvelistV5)

- CNA: **VulnCheck**
- State: PUBLISHED
- Stand: 2026-10-01 10:41:59
- CNA-CVSS: **7.0** (`CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N`)

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 108c7163f89b0dfdb149c0b596f896dce257a7fa (Commit)
- c6a01e289540971c4d0bfd8b91ee6f8438d66394 (Commit)

## BSI-Hinweise (deutsch)

- [n8n: Mehrere Schwachstellen](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2026-3393) — _BSI-Einstufung: hoch_
  Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in n8n ausnutzen, um Sicherheitsmaßnahmen zu umgehen, Daten offenzulegen oder zu manipulieren oder Code auszuführen.

## Referenzen

- <https://github.com/n8n-io/n8n/security/advisories/GHSA-597w-c3jh-g8fg>
- <https://www.vulncheck.com/advisories/n8n-before-1.123.80-2.39.6-and-2.40.1-path-traversal-via-resume-url-generation>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-103254) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_