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.
Published: 2026-09-16
Score: 8.7 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories

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History

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'}


Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

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

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

Link: CVE-2026-92761

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

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

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

Link: CVE-2026-92761

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses