CVE-2026-6596 MEDIUM

CVE-2026-6596: langflow-ai langflow API Endpoint endpoints.py create_upload_file unrestricted upload

Vendor Langflow-Ai
Product langflow
Weakness CWE-434 · Unrestricted file upload
Published April 20, 2026
Last update April 20, 2026

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

A security flaw has been discovered in langflow-ai langflow up to 1.1.0. This issue affects the function create_upload_file of the file src/backend/base/Langflow/api/v1/endpoints.py of the component API Endpoint. The manipulation results in unrestricted upload. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Key dates

02Disclosure timeline

April 20, 2026 CVE published
April 20, 2026 Record updated