CVEvulnerability

CVE-2026-30963

2.7 LOW Published 2026-06-01 Modified 2026-07-22 Official page ↗
Status
Analyzed
Published
2026-06-01
Last modified
2026-07-22
Assigner
[email protected]
CVSS 3.1 ([email protected])
3.9 LOW — CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L
CVSS 3.1 ([email protected])
2.7 LOW — CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Weaknesses
CWE-20

Description

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 namespace/status subresource APIs can also modify various fields of a namespace, including the metadata field. Prior to version 0.13.0, the webhook does not define interception rules for these subresources. As a result, if a tenant administrator has permission to modify namespace/status or namespace/finalize, they can successfully perform namespace hijacking. Version 0.13.0 fixes the issue. Another mitigation is to add two subresources (namespaces and snamespaces/status with namespace/finalize within it) to the resources list in the ValidatingWebhookConfiguration rules.

Affected configurations

• projectcapsule capsule (< 0.13.0)

Related

Weakness · CWE (1)

  • CWE-20 Improper Input Validation weakness

References