CVE-2025-55205CRITICAL 9.0EPSS p34.8%

CVE-2025-55205CVE-2025-55205

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.

Scoring

CVSS 3.19.0 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
EPSS0.44% probability of exploitation · percentile 34.8% · 2026-06-19T12:03:05Z
Published2025-08-18
Last modified2026-04-15

Underlying weaknesses· 1

CWE-863

References

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

1

TypeTargetConfidenceTier
WeaknessIncorrect Authorizationcwe-8630%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.