---
id: CVE-2026-107854
title: Jexactyl is a customisable game management panel and billing system
summary: >-
  Jexactyl is a customisable game management panel and billing system. From
  4.0.0 until 4.0.5, the POST /api/client/billing/free/process endpoint accepts
  a client-controlled server_id and loads the server without restricting the
  lookup to …
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L'
cwe:
  - CWE-639
published: '2026-10-09'
updated: '2026-10-09'
sourceUpdated: '2026-10-09T21:17:03.233'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-107854'
references:
  - url: >-
      https://github.com/Jexactyl/Jexactyl/commit/356a5b46a18d483ae90c862e130b1969e6df0777
    label: security-advisories@github.com
  - url: 'https://github.com/Jexactyl/Jexactyl/releases/tag/v4.0.5'
    label: security-advisories@github.com
  - url: >-
      https://github.com/Jexactyl/Jexactyl/security/advisories/GHSA-9xwv-p7r5-5h5p
    label: security-advisories@github.com
tags:
  - nvd
ingestedAt: '2026-10-09T22:14:52.099Z'
---

## Overview

Jexactyl is a customisable game management panel and billing system. From 4.0.0 until 4.0.5, the POST /api/client/billing/free/process endpoint accepts a client-controlled server_id and loads the server without restricting the lookup to servers owned by the authenticated account. On installations with billing enabled, an authenticated user can renew or unsuspend another tenant's billable server when its renewal_date is non-null and more than seven days away, even without a subuser relationship to that server. This issue is fixed in version 4.0.5.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.