Cross-Site Scripting Vulnerability in langflow by langflow-ai
CVE-2026-6600

5.1MEDIUM

Key Information:

Vendor: Langflow-ai
Status: Langflow
Vendor: CVE Published:; 20 April 2026

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👾 Exploit Exists🟡 Public PoC

What is CVE-2026-6600?

A cross-site scripting (XSS) vulnerability has been identified in the langflow application, specifically within the Frontend React component rendering. This vulnerability affects versions up to 1.8.3 and can be exploited through manipulation of the affected script located in the src/frontend/src/modals/IOModal/components/chatView/chatMessage/components/edit-message.tsx file. An attacker could execute this exploit remotely, potentially leading to unauthorized actions within the user's context. Efforts to inform the vendor of this security flaw have not received any response, leaving users exposed to potential exploitation.

Affected Version(s)

langflow 1.8.0

langflow 1.8.1

langflow 1.8.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-6600 - Proof of Concept