CVE-2026-92761 WebVirtCloud Missing Authorization on Instance Control Actions
View-only users can perform privileged actions like powering off VMs and resetting passwords 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-2026-92761?
CVE-2026-92761 is a high-severity missing authorization vulnerability in retspen webvirtcloud, published on 16 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
WebVirtCloud fails to properly validate permission flags in UserInstance grants, allowing view-only users to perform privileged actions. Attackers with read-only grants can power off virtual machines, reset root passwords, install SSH keys, and manage ISO images by exploiting the get_instance gate that only checks grant existence.
Weakness: CWE-862
Which versions are affected by CVE-2026-92761?
How do I fix CVE-2026-92761?
No fix has been published for CVE-2026-92761 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-2026-92761 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-92761 exists.
Sources
Also known as GHSA-xx6h-4cr4-fw2m.