Is this vulnerability remotely exploitable?

Yes. As described, the issue can be exploited remotely through the exposed Langflow API endpoint, provided an attacker can reach the upload URL over the network.

Does exploitation require authentication or special privileges?

The description does not guarantee strong authentication around the upload endpoint. In many misconfigured or default deployments, attackers may only need network access to interact with `create_upload_file`, though actual requirements depend on how the instance is deployed and secured.

What is the safest general fix pattern for developers?

Introduce a hardened upload pipeline that includes strict allowlisting of file types, size and rate limits, server-generated filenames, storage in non-executable locations, and clear authorization rules governing who can upload and for what purpose. Treat all uploaded content as untrusted and ensure it cannot be interpreted as code.

Severity:

HIGH RISK

(7.3)

Unrestricted File Upload (CWE-434) in Langflow API Endpoint create_upload_file

CVE-2026-6596

Published:

Apr 19, 2026

Status:

Deferred

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-74;CWE-89

HIGH RISK

HIGH

(7.3)

SQL Injection via Unsanitized ID Parameter (CWE-89) in Pharmacy Sales and Inventory System /ajax.php

Database Compromise and Data Integrity Loss

April 27, 2026

CWE-863

HIGH RISK

HIGH

(8.5)

Incorrect Authorization (CWE-863) in OpenClaw chat.send Session Management

Privilege Escalation and Unauthorized Session Control

April 27, 2026

Vulnerability Type

Category:

Unrestricted File Upload

CWE:

CWE-284;CWE-434

Impact:

Remote arbitrary file upload with potential for code execution, data compromise, and service abuse

Severity:

HIGH RISK

(7.3)

CVSS Version:

3.1

Vulnerability Type

Category:

Unrestricted File Upload

CWE:

CWE-284;CWE-434

Impact:

Remote arbitrary file upload with potential for code execution, data compromise, and service abuse

Severity:

HIGH RISK

(7.3)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

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Ask AI for summary of CodeAnt

Unrestricted File Upload (CWE-434) in Langflow API Endpoint create_upload_file

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

SQL Injection via Unsanitized ID Parameter (CWE-89) in Pharmacy Sales and Inventory System /ajax.php

HIGH RISK

HIGH

(8.5)

Incorrect Authorization (CWE-863) in OpenClaw chat.send Session Management

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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