CVE-2026-92761NVD

Vulnerability Summary

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.

Severity Level

HIGH(8.8)

Published Date

Sep 16, 2026

Last Modified

Sep 21, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

0.44%Probability

Root Weakness (CWE)

CWE-862: Missing Authorization ↗

The software does not perform an authorization check when an actor attempts to access a resource or perform an action.

CVSS v4.0 Base Metrics — Score 8.7 (HIGH)

Attack VectorNetwork

Attack ComplexityLow

Attack RequirementsNone

Privileges RequiredLow

User InteractionNone

Confidentiality (Vulnerable System)High

Integrity (Vulnerable System)High

Availability (Vulnerable System)High

Confidentiality (Subsequent System)None

Integrity (Subsequent System)None

Availability (Subsequent System)None

CVSS v3.1 Base Metrics — Score 8.8 (HIGH)

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

Affected & Patched Versions

Affected Versions

retspen webvirtcloud >= 1b2da68b2800f94674dd96f4a986cde30ac88280

Patched Versions

Not provided by cveorg for this CVE.

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