Kubernetes
CVE-2026-22806
CRITICAL
Severity by source
AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
Lifecycle Timeline
2DescriptionGitHub Advisory
vCluster Platform provides a Kubernetes platform for managing virtual clusters, multi-tenancy, and cluster sharing. Prior to versions 4.6.0, 4.5.4, 4.4.2, and 4.3.10, when an access key is created with a limited scope, the scope can be bypassed to access resources outside of it. However, the user still cannot access resources beyond what is accessible to the owner of the access key. Versions 4.6.0, 4.5.4, 4.4.2, and 4.3.10 fix the vulnerability. Some other mitigations are available. Users can limit exposure by reviewing access keys which are scoped and ensuring any users with access to them have appropriate permissions set. Creating automation users with very limited permissions and using access keys for these automation users can be used as a temporary workaround where upgrading is not immediately possible but scoped access keys are needed.
AnalysisAI
Authorization bypass in vCluster Platform Kubernetes virtual cluster management before 4.6.0/4.5.4/4.4.4. Users can access resources outside their authorized virtual cluster scope.
Technical ContextAI
CWE-863 incorrect authorization in virtual cluster boundaries. Users can escape their vCluster scope to access resources in the parent cluster.
Affected ProductsAI
vCluster Platform < 4.6.0/4.5.4/4.4.4
RemediationAI
Update vCluster Platform.
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External POC / Exploit Code
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