CVE-2026-92761

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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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

Configurations

No configuration.

History

21 Sep 2026, 18:17

Type	Values Removed	Values Added
References	~~() https://github.com/retspen/webvirtcloud/issues/682 -~~	() https://github.com/retspen/webvirtcloud/issues/682 -

16 Sep 2026, 21:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-16 21:17

Updated : 2026-09-23 17:17

NVD link : CVE-2026-92761

Mitre link : CVE-2026-92761

CVE.ORG link : CVE-2026-92761

JSON object : View

Products Affected

No product.

CWE

CWE-862

Missing Authorization

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