CVE-2026-21445

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.7.0.dev45, multiple critical API endpoints in Langflow are missing authentication controls. The issue allows any unauthenticated user to access sensitive user conversation data, transaction histories, and perform destructive operations including message deletion. This affects endpoints handling personal data and system operations that should require proper authorization. Version 1.7.0.dev45 contains a patch.

Affected products

Langflow

Langflow

< 1.7.1

Fix

Available

CVSS 4.0

9.3 CRITICAL

CVSS 3.1

9.1 CRITICAL

EPSS

34.7% (98th percentile)

Weakness

CWE-306

NVD status

Analyzed

Published

2026-01-02