GHSA-FCPM-6MXQ-M5VV Capsule tenant owners with "patch namespace" permission can hijack system namespaces label

Summary A namespace label injection vulnerability in Capsule v0.10.3 allows authenticated tenant users to inject arbitrary labels into system namespaces kube-system, default, capsule-system, bypassing multi-tenant isolation and potentially accessing cross-tenant resources through TenantResource...

CVE-2025-55205

Capsule is a multi-tenancy and policy-based framework for Kubernetes. A namespace label injection vulnerability in Capsule v0.10.3 and earlier allows authenticated tenant users to inject arbitrary labels into system namespaces kube-system, default, capsule-system, bypassing multi-tenant isolation...