What’s Vulnerable › Vulnerabilities

CVE-2026-65835: Capsule: Incomplete fix of CVE-2026-22872: TenantResource RawItems and Generators still allow cluster-scoped resource creation (cross-tenant privilege escalation)

• Severity: medium (CVSS 6.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-30 · updated 2026-10-23
• Weakness: CWE-269

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.

Affected products

• projectcapsule capsule: from 0.13.0, < 0.13.8

References

• https://github.com/projectcapsule/capsule/releases/tag/v0.13.8
• https://github.com/projectcapsule/capsule/security/advisories/GHSA-jr6p-8pjj-mfx6
• https://github.com/projectcapsule/capsule/security/advisories/GHSA-jr6p-8pjj-mfx6

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