CVE-2025-55205

critical · 9

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

0.5%

EPSS (exploit prob.)

39th

EPSS percentile

2025-08-18

Published

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Weaknesses

CWE-863

References

https://github.com/projectcapsule/capsule/commit/e1f47feade6e1695b2204407607d07c3b3994f6e
https://github.com/projectcapsule/capsule/security/advisories/GHSA-fcpm-6mxq-m5vv

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2025-55205