CVE-2026-65834

creationtimestamp| type| source ---|---|--- 2026-07-31 18:35:08+00:00| published-proof-of-concept| https://github.com/projectcapsule/capsule/security/advisories/GHSA-68cj-mvg9-rgm2...

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

Summary CVE-2026-22872 GHSA-qjjm-7j9w-pw72 reported that a Tenant Owner could create cluster-scoped resources e.g. ClusterRole, ValidatingWebhookConfiguration through a TenantResource, because the controller applies them with its cluster-admin ServiceAccount and SetNamespace is ineffective for...

Capsule Namespace Hijacking via subresource

Summary To defend against namespace hijacking achieved through update/patch operations on namespaces, Capsule uses a webhook to validate update requests targeting namespaces. However, in Kubernetes, the namespace/finalize and namespace/status subresource APIs can also modify various fields of a...

Capsule tenant owner with "patch namespace" permission can hijack system namespaces

Attack Vector Then, let me briefly explain the reasons for the errors mentioned above: 1. The 'kubectl edit' command was used to patch the namespace, but this operation requires both 'get' and 'patch' permissions, hence the error. One should use methods like 'curl' to directly send a PATCH reques...