CVE-2026-65835

Capsule: Incomplete fix of CVE-2026-22872: TenantResource RawItems and Generators still allow cluster-scoped resource creation (cross-tenant privilege escalation)

State: Published
Severity: 6.6 Medium
Published: Jul 30, 2026
Updated: Jul 31, 2026
Reserved: Jul 22, 2026

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Description

Capsule is a multi-tenancy and policy-based framework for Kubernetes. From 0.13.0 until 0.13.8, after the incomplete CVE-2026-22872 fix, TenantResource RawItems and Generators in internal/controllers/resources/collect.go, including handleRawItem and handleGeneratorItem, did not apply the ResourceReference.LoadResources and IsNamespacedGVK cluster-scoped resource rejection guard used by NamespacedItems, allowing a Tenant Owner to create cluster-scoped resources such as ClusterRole or ValidatingWebhookConfiguration through the cluster-admin controller client. This issue is fixed in version 0.13.8.

Scores

CVSS	Score	Vector	Source
3.1	6.6 Medium	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L	GitHub_M

Weaknesses

CWE-269 Improper Privilege Management
CWE-863 Incorrect Authorization

Affected Products

Product	Versions
capsuleprojectcapsule	>= 0.13.0, < 0.13.8Affected

References

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