---
cve: "CVE-2026-77076"
severity: "HIGH"
cvss: 7.1
epss: "0.3%"
vendor: "n8n-io"
kev: false
exploited: false
published: "2026-08-20 11:21:10"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-22T20:27:34+02:00"
---

# CVE-2026-77076

> 7.1 HIGH · 🧪 PoC

## Beschreibung

n8n versions before 1.123.69, 2.33.4, and 2.34.1 contain an information disclosure vulnerability in the GraphQL node. When a GraphQL request fails at the connection level, the node re-throws the underlying HTTP client error unchanged instead of wrapping it in n8n's standard error type. That error contains the live request's headers, including a decrypted credential secret, which the execution engine persists verbatim. Any authenticated user able to read the resulting execution can retrieve the decrypted credential secret from the stored run data.

## CVSS-Vektor

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

- 430e6e597ab43d2326aa11cd30fcf633766fca31 (Commit)
- 14c9aef0552fb4776501ca1c4589451891dd0ef4 (Commit)

## Referenzen

- <https://github.com/n8n-io/n8n/security/advisories/GHSA-9fqj-7wc5-cwhx>
- <https://www.vulncheck.com/advisories/n8n-before-credential-leak-via-graphql-node-error>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-77076) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_