CVE-2026-107854 Jexactyl: Free-billing order endpoint renews and unsuspends arbitrary servers by ID (missing ownership check)
Authenticated users can renew or unsuspend arbitrary game servers belonging to other tenants due to missing ownership checks in the billing endpoint.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-107854?
CVE-2026-107854 is a medium-severity missing authorization vulnerability in Jexactyl, published on 9 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-639
Which versions are affected by CVE-2026-107854?
How do I fix CVE-2026-107854?
No fix has been published for CVE-2026-107854 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-107854 being exploited?
There is no known exploitation of CVE-2026-107854 in the wild and no public exploit code.
Sources
Also known as GHSA-9xwv-p7r5-5h5p.