---
cve: "CVE-2026-100607"
severity: "CRITICAL"
cvss: 9.2
epss: "0.3%"
vendor: "FlowiseAI"
kev: false
exploited: false
published: "2026-09-26 14:16:40"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-10-02T10:32:18+02:00"
---

# CVE-2026-100607

> 9.2 CRITICAL · 🧪 PoC

## Beschreibung

Flowise through 3.1.4 resolves SSO and local-password users solely by email without storing provider or subject identifier bindings, allowing attackers to authenticate as any existing user by claiming their email at any configured SSO provider. Attackers can gain complete account access including chatflows, credentials, and API keys by authenticating through a different SSO provider or local password than the victim's original registration method.

## CNA-Record (Kanon, cvelistV5)

- CNA: **VulnCheck**
- State: PUBLISHED
- Stand: 2026-09-28 17:07:58
- CNA-CVSS: **9.2** (`CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **poc**
  - Automatable: **no**
  - Technical Impact: **total**

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/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 | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- a65f81bb43ef66d3ce734bf0dff4223ae8041c95 (Commit)

## BSI-Hinweise (deutsch)

- [Flowise: Mehrere Schwachstellen](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2026-3313) — _BSI-Einstufung: hoch_
  Ein Angreifer kann mehrere Schwachstellen in Flowise ausnutzen, um seine Privilegien zu erhöhen, Benutzerkonten zu übernehmen, Sicherheitsmaßnahmen zu umgehen und Daten zu manipulieren oder offenzulegen.

## Referenzen

- <https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-cffm-583c-vffr>
- <https://www.vulncheck.com/advisories/flowise-through-3.1.4-authentication-bypass-via-email-only-sso>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-100607) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_