CVE-2026-21445
Critical
Description
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.
SeverityCritical
CVSS9.1
Exploit probability—
Product
Langflow
PublishedJan 2, 2026
First seenJan 2, 2026
Weakness typeCWE-306Missing authentication for critical function
How to fix
Update
- langflow langflow1.7.1 or later
- langflow-base0.7.1 or later
- langflow1.7.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| langflow langflow | v < 1.7.1 | 1.7.1 |
| langflow-basePyPI | v < 0.7.1 | 0.7.1 |
| langflowPyPI | v < 1.7.1 | 1.7.1 |
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