---
cve: "CVE-2026-55255"
severity: "HIGH"
cvss: 8.4
epss: "0.9%"
vendor: "langflow-ai"
kev: true
exploited: true
published: "2026-06-23 16:28:20"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T23:16:12+02:00"
---

# CVE-2026-55255

> 8.4 HIGH · ⚠️ CISA KEV (75 Tage) · 🔓 Exploited · 🧪 PoC

## Beschreibung

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.1, an Insecure Direct Object Reference (IDOR) vulnerability in /api/v1/responses endpoint allows an authenticated attacker to execute any flow belonging to another user by specifying the victim's flow ID in the request. This vulnerability is fixed in 1.9.1.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Gering | warn |

## Patch verfügbar (OSV)

- dc26d19c1ed5b2779a3a759f78a747f47089c534 (Commit)
- 2c9f498d664a3c32698b57d7c5e752625291060e (Commit)

## Referenzen

- <https://github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2>
- <https://github.com/langflow-ai/langflow/pull/12832>
- <https://github.com/langflow-ai/langflow/commit/2c9f498d664a3c32698b57d7c5e752625291060e>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-55255) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_