CVE-2026-25893: Fuxa server Remote Code Execution Vulnerability

CRITICAL
Advisory Identifier: GHSA-vwcg-c828-9822
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CWE-287 CWE-285
Published
Advisory Summary

CVE-2026-25893 is a CRITICAL remote code execution vulnerability (CWE-287: Improper Authentication) affecting Fuxa server libraries in the npm ecosystem. The issue involves fuxa unauthenticated remote code execution via admin jwt minting. Remediation is available by upgrading affected packages to version 1.2.10.

CVE-2026-25893 at a Glance

CVE Identifier CVE-2026-25893
GHSA Identifier GHSA-vwcg-c828-9822
Severity CRITICAL
CVSS v3.1 Base Score N/A
CWE Classification CWE-287: Improper Authentication
Affected Product Fuxa server
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2026-25893

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-2026-25893, 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-287: Improper Authentication, where when an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. 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

### Note GitHub incorrectly stated this vulnerability is identical to CVE-2025-69970, which describes the fact that authentication is disabled by default. This advisory describes an exploit chain that enables authentication bypass via the heartbeat refresh endpoint when authentication is enabled. This misleads users into thinking that enabling authentication would mitigate this vulnerability. Please see the patch for more information: https://github.com/frangoteam/FUXA/commit/fe82348d160904d0013b9a3e267d50158f5c7afb. ### Description An authentication bypass vulnerability in FUXA allows an unauthenticated, remote attacker to gain administrative access via the heartbeat refresh API and execute arbitrary code on the server. This affects FUXA through version 1.2.9 when authentication is enabled. This issue has been patched in FUXA version 1.2.10. ### Impact Affected deployments are those with `runtime.settings.secureEnabled` set to `true`. Exploitation allows an unauthenticated, remote attacker to bypass all authentication mechanisms and obtain administrative access to the FUXA instance by minting administrator JWTs via the heartbeat refresh endpoint. With these elevated privileges, the attacker can interact with administrative APIs, including intended features designed for automation and scripting, to execute arbitrary code in the context of the FUXA service. 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.

CVE-2026-25893 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-vwcg-c828-9822
NVD — CVE-2026-25893 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-25893
Security Fix Commit FIX COMMIT
https://github.com/frangoteam/FUXA/commit/fe82348d160904d0013b9a3e267d50158f5c7afb
Fuxa server Source Repository REPOSITORY
https://github.com/frangoteam/FUXA

Frequently Asked Questions

What is CVE-2026-25893?
CVE-2026-25893 is a security vulnerability in Fuxa server involving FUXA Unauthenticated Remote Code Execution via Admin JWT Minting under CWE-287: Improper Authentication.
Which Fuxa server versions are affected?
Affected versions include releases prior to 1.2.10 across affected packages: fuxa-server.
What version fixes CVE-2026-25893?
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-2026-25893?
CVE-2026-25893 is classified under CWE-287: Improper Authentication (When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.).
How can I check npm dependencies for CVE-2026-25893?
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-vwcg-c828-9822",
  "modified" : "2026-02-10T02:56:42Z",
  "published" : "2026-02-05T00:27:53Z",
  "aliases" : [ "CVE-2026-25893" ],
  "summary" : "FUXA Unauthenticated Remote Code Execution via Admin JWT Minting",
  "details" : "### Note\nGitHub incorrectly stated this vulnerability is identical to CVE-2025-69970, which describes the fact that authentication is disabled by default. This advisory describes an exploit chain that enables authentication bypass via the heartbeat refresh endpoint when authentication is enabled. This misleads users into thinking that enabling authentication would mitigate this vulnerability. Please see the patch for more information: https://github.com/frangoteam/FUXA/commit/fe82348d160904d0013b9a3e267d50158f5c7afb.\n\n### Description\nAn authentication bypass vulnerability in FUXA allows an unauthenticated, remote attacker to gain administrative access via the heartbeat refresh API and execute arbitrary code on the server. This affects FUXA through version 1.2.9 when authentication is enabled. This issue has been patched in FUXA version 1.2.10.\n\n### Impact\nAffected deployments are those with `runtime.settings.secureEnabled` set to `true`.\n\nExploitation allows an unauthenticated, remote attacker to bypass all authentication mechanisms and obtain administrative access to the FUXA instance by minting administrator JWTs via the heartbeat refresh endpoint. With these elevated privileges, the attacker can interact with administrative APIs, including intended features designed for automation and scripting, to execute arbitrary code in the context of the FUXA service. 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.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/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-vwcg-c828-9822"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-25893"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/frangoteam/FUXA/commit/fe82348d160904d0013b9a3e267d50158f5c7afb"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/frangoteam/FUXA"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-285", "CWE-287" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-05T00:27:53Z",
    "nvd_published_at" : "2026-02-09T23:16:05Z"
  }
}