CVE-2026-65916 CyberPanel Missing Authorization in cancelBackupCreation Handler
Authenticated users can delete or corrupt other tenants' backups via the cancelBackupCreation handler due to missing authorization checks.
- 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-2026-65916?
CVE-2026-65916 is a high-severity missing authorization vulnerability in usmannasir cyberpanel, published on 23 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
CyberPanel through 1.9.1, fixed in commit b198460, contains a missing authorization vulnerability in the cancelBackupCreation handler that allows authenticated users to kill, delete, and corrupt other tenants' backups. Attackers can send crafted POST requests with arbitrary backupCancellationDomain and fileName parameters to terminate backup processes, delete backup archives, corrupt backup status files, and remove database records belonging to other tenants.
Weakness: CWE-862
Which versions are affected by CVE-2026-65916?
How do I fix CVE-2026-65916?
No fix has been published for CVE-2026-65916 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-2026-65916 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-65916 exists.
Sources
Also known as GHSA-4r84-m75g-p4ww.