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.
History

Tue, 22 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 18 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
First Time appeared Retspen
Retspen webvirtcloud
Vendors & Products Retspen
Retspen webvirtcloud

Wed, 16 Sep 2026 20:45:00 +0000

Type Values Removed Values Added
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.
Title WebVirtCloud Missing Authorization on Instance Control Actions
Weaknesses CWE-862
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-09-16T20:32:28.410Z

Updated: 2026-09-21T17:48:40.749Z

Reserved: 2026-09-16T19:06:20.513Z

Link: CVE-2026-92761

cve-icon Vulnrichment

Updated: 2026-09-21T17:48:16.791Z

cve-icon NVD

Status : Deferred

Published: 2026-09-16T21:17:24.780

Modified: 2026-09-23T17:17:48.237

Link: CVE-2026-92761

cve-icon Redhat

No data.