CVE-2026-43945: FUXA Remote Code Execution via Path Manipulation & Configuration Injection
Summary
CVE-2026-43945: FUXA Vulnerable to Pre-auth RCE via Path Manipulation & Configuration Injection. Affects @frangoteam/fuxa versions >= 1.2.11, < 1.3.1. Fixed in 1.3.1. How to fix ↓
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Background
FUXA is an open-source framework designed to facilitate the integration of various IoT devices and services, particularly in industrial settings. It provides functionalities for managing data streams and automating processes. However, a critical vulnerability has been identified in version 1.3.0-2706, which exposes the system to remote code execution (RCE) attacks, even under secure configurations.
Vulnerability Detail
The vulnerability arises from a Path Confusion flaw in the authentication middleware of FUXA. The server improperly uses a substring match on the full URL, including query parameters, to determine authentication requirements. This allows an unauthenticated attacker to bypass security checks by appending specific query parameters to administrative requests, potentially leading to full remote code execution within the Node-RED environment. The impact is severe, as it grants attackers access to sensitive industrial data and control over critical systems.
How To Fix
Latest published version: 1.3.5 as of 23 Oct 2026
npm install @frangoteam/fuxa@1.3.5Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
1.3.1
This is the first release that contains the fix.
npm install @frangoteam/fuxa@1.3.1Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can modify the authentication middleware to use 'req.path' instead of 'req.originalUrl'. This change ensures that query strings are not considered in the authentication logic. The secure approach can be implemented as follows:
const pathname = req.path;
if (pathname.startsWith('/socket.io/')) return next();
Conclusion
In summary, CVE-2026-43945 represents a critical vulnerability in the FUXA framework that allows for remote code execution due to improper authentication handling. Users are strongly advised to update to the latest version to mitigate this risk and ensure the security of their systems.
See every vulnerability recorded for @frangoteam/fuxa →
FAQ
The CVSS score of this vulnerability is 8.9, indicating a high severity level.
Yes, the vulnerability allows unauthenticated remote attackers to exploit the system.
FUXA versions prior to 1.3.1 are affected by this vulnerability.
Exploitation of this vulnerability can lead to full remote code execution, allowing attackers to manipulate industrial data and systems.
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References
Related vulnerabilities
Recent vulnerabilities recorded for @frangoteam/fuxa.
