CVE-2026-92761

Sažetak

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.

Reference

https://github.com/retspen/webvirtcloud
https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac88280/instances/views.py#L316-L330
https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac88280/instances/views.py#L356-L363
https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac88280/instances/views.py#L538-L546
https://github.com/retspen/webvirtcloud/issues/682
https://www.vulncheck.com/advisories/webvirtcloud-missing-authorization-on-instance-control-actions
https://github.com/retspen/webvirtcloud/issues/682

CVSS

Base:	8.8
Impact:	5.9
Exploitability:	2.8

Pristup

Vektor	Složenost	Autentikacija
NETWORK	LOW	LOW

Impact

Povjerljivost	Cjelovitost	Dostupnost
HIGH	HIGH	HIGH

CVSS vektor

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Zadnje važnije ažuriranje

23-09-2026 - 17:17

Objavljeno

16-09-2026 - 21:17