---
cve: "CVE-2026-91935"
severity: "HIGH"
cvss: 8.7
epss: "0.3%"
vendor: "FlowiseAI"
kev: false
exploited: false
published: "2026-09-15 16:17:44"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T12:19:33+02:00"
---

# CVE-2026-91935

> 8.7 HIGH · 🧪 PoC

## Beschreibung

Flowise before 3.1.4 fails to validate baseURL parameters in chat-model nodes, allowing authenticated users to redirect requests to arbitrary hosts. Attackers with chatflows:create or chatflows:update permissions can exfiltrate LLM provider API keys by redirecting requests to cloud metadata services or internal hosts.

## CVSS-Vektor

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

- a65f81bb43ef66d3ce734bf0dff4223ae8041c95 (Commit)

## Referenzen

- <https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-hx55-h48h-7rw9>
- <https://www.vulncheck.com/advisories/flowise-before-3.1.4-ssrf-and-api-key-exfiltration-via-chat-model-nodes>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-91935) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_