---
cve: "CVE-2026-27966"
severity: "CRITICAL"
cvss: 9.8
epss: "33.7%"
vendor: "langflow-ai"
kev: false
exploited: false
published: "2026-02-26 02:16:23"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-08T13:57:32+02:00"
---

# CVE-2026-27966

> 9.8 CRITICAL · 🧪 PoC

## Beschreibung

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.8.0, the CSV Agent node in Langflow hardcodes `allow_dangerous_code=True`, which automatically exposes LangChain’s Python REPL tool (`python_repl_ast`). As a result, an attacker can execute arbitrary Python and OS commands on the server via prompt injection, leading to full Remote Code Execution (RCE). Version 1.8.0 fixes the issue.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- af039ee7bd2366ebf6a739ed8e26657e8a2fc1a3 (Commit)
- d8c6480daa17b2f2af0b5470cdf5c3d28dc9e508 (Commit)

## Referenzen

- <https://github.com/langflow-ai/langflow/security/advisories/GHSA-3645-fxcv-hqr4>
- <https://github.com/langflow-ai/langflow/commit/d8c6480daa17b2f2af0b5470cdf5c3d28dc9e508>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-27966) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_