Capsule tenant owners with “patch namespace” permission can hijack system namespaces label_CVE-2025-55205

{
    "lastseen": "",
    "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.",
    "published": "2025-08-18T16:28:51.317Z",
    "modified": "2025-08-18T17:39:07.476Z",
    "type": "cve",
    "title": "Capsule tenant owners with \"patch namespace\" permission can hijack system namespaces label",
    "source": "GitHub_M",
    "references": "https://github.com/projectcapsule/capsule/security/advisories/GHSA-fcpm-6mxq-m5vv\nhttps://github.com/projectcapsule/capsule/commit/e1f47feade6e1695b2204407607d07c3b3994f6e",
    "id": "CVE-2025-55205",
    "bulletinFamily": "",
    "cwe": [
        "CWE-863"
    ],
    "cvelist": null,
    "sourceData": "projectcapsule capsule < 0.10.4",
    "sourceHref": "",
    "cvss": {
        "score": 9.1,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
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        "confidentialityImpact": "",
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        "availabilityImpact": "",
        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "capsule",
    "version": "< 0.10.4",
    "vendor": "projectcapsule",
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    "ai_score": 0
}