CVE-2026-22872

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{"affected": [{"affectedData": [{"product": "capsule", "vendor": "projectcapsule", "versions": [{"status": "affected", "version": "< 0.13.0"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:projectcapsule:capsule:*:*:*:*:*:*:*:*", "matchCriteriaId": "A7404B12-5E27-4AB9-80C0-82901F2AA44B", "versionEndExcluding": "0.13.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Capsule is a multi-tenancy and policy-based framework for Kubernetes. The Capsule Controller runs with cluster-admin privileges. Although the TenantResource RawItems processing logic forcibly sets the namespace, this is ineffective for cluster-scoped resources. Prior to version 0.13.0, tenant administrators can leverage the Controller's elevated privileges to create cluster-scoped resources (such as ClusterRole and ValidatingWebhookConfiguration) that they cannot create directly, achieving cross-tenant privilege escalation and cluster-level attacks. The attack vector has a few limiting factors. This attack requires Tenant Owner privileges and requires Capsule Controller running with cluster-admin privileges (default configuration). Additionally, some clusters may have additional admission controllers blocking malicious resources. Version 0.13.0 patches this issue."}, {"lang": "es", "value": "Capsule es un framework multi-inquilino y basado en pol\u00edticas para Kubernetes. El Capsule Controller se ejecuta con privilegios de cluster-admin. Aunque la l\u00f3gica de procesamiento de TenantResource RawItems establece forzosamente el espacio de nombres, esto es ineficaz para los recursos de \u00e1mbito de cl\u00faster. Antes de la versi\u00f3n 0.13.0, los administradores de inquilinos pueden aprovechar los privilegios elevados del Controller para crear recursos de \u00e1mbito de cl\u00faster (como ClusterRole y ValidatingWebhookConfiguration) que no pueden crear directamente, logrando una escalada de privilegios entre inquilinos y ataques a nivel de cl\u00faster. El vector de ataque tiene algunos factores limitantes. Este ataque requiere privilegios de Propietario de Inquilino y requiere que Capsule Controller se ejecute con privilegios de cluster-admin (configuraci\u00f3n predeterminada). Adem\u00e1s, algunos cl\u00fasteres pueden tener controladores de admisi\u00f3n adicionales que bloquean recursos maliciosos. La versi\u00f3n 0.13.0 parchea este problema."}], "id": "CVE-2026-22872", "lastModified": "2026-07-22T07:10:00.107", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 6.0, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.9, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "PROOF_OF_CONCEPT", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "HIGH", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-22872", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-02T12:45:37.635453Z", "version": "2.0.3"}}]}, "published": "2026-06-01T19:16:21.943", "references": [{"source": "security-advisories@github.com", "tags": ["Product", "Release Notes"], "url": "https://github.com/projectcapsule/capsule/releases/tag/v0.13.0"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/projectcapsule/capsule/security/advisories/GHSA-qjjm-7j9w-pw72"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/projectcapsule/capsule/security/advisories/GHSA-qjjm-7j9w-pw72"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}, {"lang": "en", "value": "CWE-863"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.13.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "capsule", "source": "cna", "vendor": "projectcapsule"}, "product": "capsule", "vendor": "projectcapsule"}], "created": "2026-06-01T20:30:16.531289+00:00", "updated": "2026-06-01T21:00:15.827168+00:00", "vendors": ["projectcapsule", "projectcapsule$PRODUCT$capsule"]}