CVE-2026-25895: Fuxa server Remote Code Execution Vulnerability

CRITICAL
Advisory Identifier: GHSA-88qh-cphv-996c
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CWE-306 CWE-22
Published
Advisory Summary

CVE-2026-25895 is a CRITICAL remote code execution vulnerability (CWE-306: Missing Authentication for Critical Function) affecting Fuxa server libraries in the npm ecosystem. The issue involves fuxa unauthenticated remote code execution via arbitrary file write in upload api. Remediation is available by upgrading affected packages to version 1.2.10.

CVE-2026-25895 at a Glance

CVE Identifier CVE-2026-25895
GHSA Identifier GHSA-88qh-cphv-996c
Severity CRITICAL
CVSS v3.1 Base Score N/A
CWE Classification CWE-306: Missing Authentication for Critical Function
Affected Product Fuxa server
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2026-25895

To remediate this vulnerability, upgrade all affected Fuxa server dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

fuxa-server fixed: 1.2.10 
npm install fuxa-server@1.2.10
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls fuxa-server

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-25895, inspect your project dependencies using npm:

npm ls fuxa-server

Analyze the terminal output to locate any version of Fuxa server in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.2.10), your application is affected.

Note: The npm ls fuxa-server command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-306: Missing Authentication for Critical Function, where the product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. In Fuxa server, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Summary **Description** A path traversal vulnerability in FUXA allows an unauthenticated, remote attacker to write arbitrary files to arbitrary locations on the server filesystem. This affects FUXA through version 1.2.9. This issue has been patched in FUXA version 1.2.10. ### Impact This affects all deployments, including those with `runtime.settings.secureEnabled` set to `true`. Exploitation allows an unauthenticated, remote attacker to overwrite application and system files. If the attacker can overwrite application code, startup scripts, or configuration files that are later executed/loaded, RCE is likely. Depending on deployment configuration and permissions, this may lead to full system compromise and could further expose connected ICS/SCADA environments to follow-on actions. ### Patches This issue has been patched in FUXA version 1.2.10. Users are strongly encouraged to update to the latest available release. ### Notes GitHub stated this vulnerability is identical to CVE-2025-69981, which was published against the repository out of band before coordinated disclosure concluded. CVE-2025-69981 describes a "CWE-434: Unrestricted Upload of File with Dangerous Type" vulnerability. While a CWE-434 is present, it was an unsafe, intended feature of the application that has been locked behind authentication. This report describes a "CWE-35: Path Traversal" that enables an arbitrary file write.

CVE-2026-25895 Affected Fuxa server Versions

1 component(s)
Fixed Versions:
1.2.10
Product / Package Ecosystem Affected Versions Fixed Version
fuxa-server
npm/fuxa-server
npm
< 1.2.10
1.2.10

References

GitHub Advisory / Wiki ADVISORY
https://github.com/frangoteam/FUXA/security/advisories/GHSA-88qh-cphv-996c
NVD — CVE-2026-25895 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-25895
Security Fix Commit FIX COMMIT
https://github.com/frangoteam/FUXA/commit/22c2192f5d9beef8a787c45eff3a14c24dbb5f96
Fuxa server Source Repository REPOSITORY
https://github.com/frangoteam/FUXA
Fuxa server Release RELEASE
https://github.com/frangoteam/FUXA/releases/tag/v1.2.10

Frequently Asked Questions

What is CVE-2026-25895?
CVE-2026-25895 is a security vulnerability in Fuxa server involving FUXA Unauthenticated Remote Code Execution via Arbitrary File Write in Upload API under CWE-306: Missing Authentication for Critical Function.
Which Fuxa server versions are affected?
Affected versions include releases prior to 1.2.10 across affected packages: fuxa-server.
What version fixes CVE-2026-25895?
Upgrading to 1.2.10 (or the latest patched release for your respective branch) resolves the vulnerability.
Is fuxa-server affected?
Yes, fuxa-server is affected in releases prior to 1.2.10. Upgrade your dependency to 1.2.10 or later.
What CWE is associated with CVE-2026-25895?
CVE-2026-25895 is classified under CWE-306: Missing Authentication for Critical Function (The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.).
How can I check npm dependencies for CVE-2026-25895?
Run the dependency tree command: 'npm ls fuxa-server'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-88qh-cphv-996c",
  "modified" : "2026-02-10T02:57:44Z",
  "published" : "2026-02-05T00:37:30Z",
  "aliases" : [ "CVE-2026-25895" ],
  "summary" : "FUXA Unauthenticated Remote Code Execution via Arbitrary File Write in Upload API",
  "details" : "### Summary\n**Description**\nA path traversal vulnerability in FUXA allows an unauthenticated, remote attacker to write arbitrary files to arbitrary locations on the server filesystem. This affects FUXA through version 1.2.9. This issue has been patched in FUXA version 1.2.10.\n\n### Impact\nThis affects all deployments, including those with `runtime.settings.secureEnabled` set to `true`.\n\nExploitation allows an unauthenticated, remote attacker to overwrite application and system files. If the attacker can overwrite application code, startup scripts, or configuration files that are later executed/loaded, RCE is likely. Depending on deployment configuration and permissions, this may lead to full system compromise and could further expose connected ICS/SCADA environments to follow-on actions.\n\n### Patches\nThis issue has been patched in FUXA version 1.2.10. Users are strongly encouraged to update to the latest available release.\n\n### Notes\nGitHub stated this vulnerability is identical to CVE-2025-69981, which was published against the repository out of band before coordinated disclosure concluded. CVE-2025-69981 describes a \"CWE-434: Unrestricted Upload of File with Dangerous Type\" vulnerability. While a CWE-434 is present, it was an unsafe, intended feature of the application that has been locked behind authentication. This report describes a \"CWE-35: Path Traversal\" that enables an arbitrary file write.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "fuxa-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.2.10"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.2.9"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/frangoteam/FUXA/security/advisories/GHSA-88qh-cphv-996c"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-25895"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/frangoteam/FUXA/commit/22c2192f5d9beef8a787c45eff3a14c24dbb5f96"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/frangoteam/FUXA"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/frangoteam/FUXA/releases/tag/v1.2.10"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22", "CWE-306" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-05T00:37:30Z",
    "nvd_published_at" : "2026-02-09T23:16:05Z"
  }
}