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

Quick assessment

Affected
projectcapsule capsule
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Capsule 是一个基于多租户和策略的 Kubernetes 框架。从版本 0.13.0 到 0.13.8，在对 CVE-2026-22872 的不完整修复之后，位于 internal/controllers/resources/collect.go 文件中的 TenantResource RawItems 和 Generators（包括 handleRawItem 和 handleGeneratorItem）未能应用 NamespacedItems 所使用的 ResourceReference.LoadReso

CVSS 6.6 · Medium EPSS 0.33% · P23

Possible ATT&CK Techniques 1 AI

T1098.004 · SSH Authorized Keys

Affected Version Matrix 1

VendorProduct Version RangeStatus
projectcapsule capsule >= 0.13.0, < 0.13.8 affected
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I. Basic Information for CVE-2026-65835

Vulnerability Information
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Vulnerability Title
Capsule: Incomplete fix of CVE-2026-22872: TenantResource RawItems and Generators still allow cluster-scoped resource creation (cross-tenant privilege escalation)
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
projectcapsule capsule >= 0.13.0, < 0.13.8 -

II. Public POCs for CVE-2026-65835

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III. Intelligence Information for CVE-2026-65835

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Vendor Advisories for CVE-2026-65835 (1)

Vendor Pages for CVE-2026-65835 (1)

IV. Related Vulnerabilities

Same product: capsule
Same vendor: projectcapsule
Same weakness: CWE-269

V. Comments for CVE-2026-65835

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