CVE-2025-55205
CRITICAL EPSS 35.0%
Published Aug 18, 202510mo ago · Modified Jun 17, 20262w ago
9.0 CVSS 3.1
Published Aug 18, 2025 10mo ago
Last Modified Jun 17, 2026 2w ago
Description
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 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 0.10.4.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction Required
Scope Changed
Confidentiality High
Integrity High
Availability High
Threat Intelligence
EPSS Exploit Probability
35.0% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-863 Incorrect Authorization Authorization
References 2
- github.com https://github.com/projectcapsule/capsule/commit/e1f47feade6e1695b2204407607d07c3b3994f6e
- github.com https://github.com/projectcapsule/capsule/security/advisories/GHSA-fcpm-6mxq-m5vv
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.