FKIE_CVE-2025-55205

Vulnerability from fkie_nvd - Published: 2025-08-18 17:15 - Updated: 2025-08-18 20:16
Severity ?
9.0 (Critical) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Summary
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.
References
security-advisories@github.comhttps://github.com/projectcapsule/capsule/commit/e1f47feade6e1695b2204407607d07c3b3994f6e
security-advisories@github.comhttps://github.com/projectcapsule/capsule/security/advisories/GHSA-fcpm-6mxq-m5vv
Impacted products
Vendor Product Version
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "Capsule es un marco multiinquilino basado en pol\u00edticas para Kubernetes. Una vulnerabilidad de inyecci\u00f3n de etiquetas en espacios de nombres en Capsule v0.10.3 y versiones anteriores permite a los usuarios autenticados inyectar etiquetas arbitrarias en los espacios de nombres del sistema (kube-system, default, capsule-system), omitiendo el aislamiento multiinquilino y potencialmente accediendo a recursos entre inquilinos mediante selectores TenantResource. Esta vulnerabilidad permite la escalada de privilegios y viola los l\u00edmites de seguridad fundamentales que Capsule est\u00e1 dise\u00f1ado para aplicar. Esta vulnerabilidad se corrigi\u00f3 en la versi\u00f3n 0.10.4."
    }
  ],
  "id": "CVE-2025-55205",
  "lastModified": "2025-08-18T20:16:28.750",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.0,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.3,
        "impactScore": 6.0,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-08-18T17:15:30.117",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/projectcapsule/capsule/commit/e1f47feade6e1695b2204407607d07c3b3994f6e"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/projectcapsule/capsule/security/advisories/GHSA-fcpm-6mxq-m5vv"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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