Vulnerability-Lookup

CVE-2026-43945 (GCVE-0-2026-43945)

Vulnerability from cvelistv5 – Published: 2026-07-21 21:24 – Updated: 2026-07-22 18:24

Title

FUXA Vulnerable to Pre-auth RCE via Path Manipulation & Configuration Injection

Summary

FUXA is a web-based Process Visualization (SCADA/HMI/Dashboard) software. Versions 1.2.11 until 1.3.1 allow an unauthenticated remote attacker to achieve Full Remote Code Execution (RCE) as root. The exploit succeeds even when the platform is configured in its most secure state (Secure Mode Enabled and Node-RED Secure Auth Enabled). Version 1.3.1 fixes the issue.

Severity

8.9 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-94 - Improper Control of Generation of Code ('Code Injection')
CWE-284 - Improper Access Control
CWE-288 - Authentication Bypass Using an Alternate Path or Channel
CWE-863 - Incorrect Authorization

Assigner

GitHub_M

References

2 references

URL	Tags
https://github.com/frangoteam/FUXA/security/advis…	x_refsource_CONFIRM
https://github.com/frangoteam/FUXA/releases/tag/v1.3.1	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
frangoteam	FUXA	Affected: >= 1.2.11, < 1.3.1

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-43945

Vulnerability from fkie_nvd - Published: 2026-07-21 22:17 - Updated: 2026-07-22 19:17

Severity

8.9 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/frangoteam/FUXA/releases/tag/v1.3.1
	security-advisories@github.com	https://github.com/frangoteam/FUXA/security/advisories/GHSA-p69w-mmfv-xrfj

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "FUXA",
          "vendor": "frangoteam",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.2.11, \u003c 1.3.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
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    {
      "lang": "en",
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    }
  ],
  "id": "CVE-2026-43945",
  "lastModified": "2026-07-22T19:17:03.527",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.9,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
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          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
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        "type": "Secondary"
      }
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      "source": "security-advisories@github.com",
      "url": "https://github.com/frangoteam/FUXA/releases/tag/v1.3.1"
    },
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GHSA-P69W-MMFV-XRFJ

Vulnerability from github – Published: 2026-05-26 23:40 – Updated: 2026-05-26 23:40

Summary

FUXA Vulnerable to Pre-auth RCE via Path Manipulation & Configuration Injection

Details

Pre-auth RCE in FUXA via Logic Bypass

Summary

A Critical vulnerability chain exists in FUXA (v.1.3.0-2706) that allows an unauthenticated remote attacker to achieve Full Remote Code Execution (RCE) as root. The exploit succeeds even when the platform is configured in its most secure state (Secure Mode Enabled and Node-RED Secure Auth Enabled).

Details The vulnerability is a Path Confusion flaw in the authentication middleware. The server uses a substring match on the full URL (including query parameters) to exclude certain paths from authentication.

Involved Logic:

JavaScript:

const url = req.originalUrl || req.url || req.path;
if (url.includes('/socket.io')) return next();
By appending ?x=/socket.io to any administrative request, the middleware is "tricked" into treating the request as a public WebSocket handshake, bypassing the secureEnabled and nodeRedAuthMode checks entirely.

Proof of Concept

A specially crafted request containing manipulated query parameters could bypass authentication checks on protected /nodered/* endpoints.

In configurations where Node-RED exposed privileged or command-execution capable nodes, this could lead to remote code execution within the container context.

Impact Access Level: Unauthenticated / Remote.

Privilege Level: Access to Node-RED administrative endpoints. Remote code execution may be possible depending on the Node-RED configuration and installed nodes.

CVSS 3.1 Score: High severity.

Description: An attacker can gain total control over the SCADA server, allowing them to intercept industrial data (MQTT/OPC-UA), manipulate PLC tags, or pivot into the internal OT network.

Root Cause & Remediation The root cause is the reliance on req.originalUrl for security-critical routing decisions.

The Fix: The developer must use req.path (which Express pre-parses to remove query strings) or a formal URL parser to ensure that the security check is performed only against the pathname.

JavaScript

// Secure approach
const pathname = req.path; 
if (pathname.startsWith('/socket.io/')) return next();

This issue affects only setups where Node-RED is enabled.

Severity

8.9 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@frangoteam/fuxa"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.2.11"
            },
            {
              "fixed": "1.3.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-43945"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-284",
      "CWE-288",
      "CWE-863",
      "CWE-94"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-26T23:40:42Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "**Pre-auth** RCE in FUXA via Logic Bypass\n\nSummary\n\nA Critical vulnerability chain exists in FUXA (v.1.3.0-2706) that allows an unauthenticated remote attacker to achieve Full Remote Code Execution (RCE) as root. The exploit succeeds even when the platform is configured in its most secure state (Secure Mode Enabled and Node-RED Secure Auth Enabled).\n\nDetails\nThe vulnerability is a Path Confusion flaw in the authentication middleware. The server uses a substring match on the full URL (including query parameters) to exclude certain paths from authentication.\n\nInvolved Logic:\n\nJavaScript:\n```\nconst url = req.originalUrl || req.url || req.path;\nif (url.includes(\u0027/socket.io\u0027)) return next();\nBy appending ?x=/socket.io to any administrative request, the middleware is \"tricked\" into treating the request as a public WebSocket handshake, bypassing the secureEnabled and nodeRedAuthMode checks entirely.\n```\n\nProof of Concept\n\nA specially crafted request containing manipulated query parameters could bypass authentication checks on protected /nodered/* endpoints.\n\nIn configurations where Node-RED exposed privileged or command-execution capable nodes, this could lead to remote code execution within the container context.\n\nImpact\nAccess Level: Unauthenticated / Remote.\n\nPrivilege Level: Access to Node-RED administrative endpoints. \nRemote code execution may be possible depending on the Node-RED configuration and installed nodes.\n\nCVSS 3.1 Score: High severity.\n\nDescription: An attacker can gain total control over the SCADA server, allowing them to intercept industrial data (MQTT/OPC-UA), manipulate PLC tags, or pivot into the internal OT network.\n\nRoot Cause \u0026 Remediation\nThe root cause is the reliance on req.originalUrl for security-critical routing decisions.\n\nThe Fix:\nThe developer must use req.path (which Express pre-parses to remove query strings) or a formal URL parser to ensure that the security check is performed only against the pathname.\n\n```\nJavaScript\n\n// Secure approach\nconst pathname = req.path; \nif (pathname.startsWith(\u0027/socket.io/\u0027)) return next();\n```\n\nThis issue affects only setups where Node-RED is enabled.",
  "id": "GHSA-p69w-mmfv-xrfj",
  "modified": "2026-05-26T23:40:42Z",
  "published": "2026-05-26T23:40:42Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/frangoteam/FUXA/security/advisories/GHSA-p69w-mmfv-xrfj"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/frangoteam/FUXA"
    },
    {
      "type": "WEB",
      "url": "https://github.com/frangoteam/FUXA/releases/tag/v1.3.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    }
  ],
  "summary": "FUXA Vulnerable to Pre-auth RCE via Path Manipulation \u0026 Configuration Injection"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-43945 (GCVE-0-2026-43945)

FKIE_CVE-2026-43945

GHSA-P69W-MMFV-XRFJ

Tags

Sightings

Nomenclature