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Incorrect Authorization

CVE-2025-55205

High
9/10

Summary

Capsule is a multi-tenancy and policy-based framework for Kubernetes. A Namespace Label Injection vulnerability in Capsule versions prior to 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' selectors. This vulnerability enables privilege escalation and violates the fundamental security boundaries that Capsule is designed to enforce. This vulnerability is fixed in v0.10.4.

  • LOW
  • NETWORK
  • HIGH
  • CHANGED
  • REQUIRED
  • LOW
  • HIGH
  • HIGH

CWE-863 - Incorrect Authorization

Authorization is a security mechanism performed by an application to grant or deny access to the requested resources by verifying the privileges of the user. When an application lacks effective authorization mechanisms, it enables unauthorized users to gain unintended privileges and illegitimate access to resources. Such a vulnerability may result in exposure of sensitive information, denial of service, arbitrary code execution, and complete system takeover.

References

Advisory Timeline

  • Published