CVE-2026-30963 Capsule Namespace Hijacking via subresource

Capsule is a multi-tenancy and policy-based framework for Kubernetes. 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...

Capsule 输入验证错误漏洞

Capsule is an open-source Kubernetes framework developed by Project Capsule. Versions of Capsule prior to 0.13.0 contained a vulnerability related to input validation errors. This vulnerability stemmed from rules for intercepting sub-resources named namespace/finalize and namespace/status that we...

CVE-2026-30963: Improper Input Validation

Capsule is a multi-tenancy and policy-based framework for Kubernetes. 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...

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...

GHSA-2WW6-HF35-MFJM 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...

PT-2026-44722

Name of the Vulnerable Software and Affected Versions Capsule versions prior to 0.13.0 Description Capsule uses a webhook to validate update requests targeting namespaces to prevent namespace hijacking. However, the webhook fails to define interception rules for the 'namespace/finalize' and...

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...