CVE-2026-42296

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Prior to versions 3.7.14 and 4.0.5, a user with create Workflow permission can bypass templateReferencing: Strict to get host network access, switch service accounts, override pod security context, add tolerations to schedule on control-plane nodes, or enable SA token mounting. This defeats the stated purpose of the feature. The practical impact depends on what Kubernetes-level controls are in place. Clusters with PodSecurity admission or OPA/Gatekeeper would independently block some of these (like hostNetwork). Clusters that rely on Argo's Strict mode as the primary enforcement layer are fully exposed. This issue has been patched in versions 3.7.14 and 4.0.5."}, {"lang": "es", "value": "Argo Workflows es un motor de flujo de trabajo de c\u00f3digo abierto nativo de contenedores para orquestar trabajos paralelos en Kubernetes. Antes de las versiones 3.7.14 y 4.0.5, un usuario con permiso para crear flujos de trabajo (Workflow) puede eludir templateReferencing: Strict para obtener acceso a la red del host, cambiar cuentas de servicio, anular el contexto de seguridad del pod, a\u00f1adir tolerancias para programar en nodos del plano de control, o habilitar el montaje de tokens de SA. Esto anula el prop\u00f3sito declarado de la caracter\u00edstica. El impacto pr\u00e1ctico depende de los controles a nivel de Kubernetes que est\u00e9n implementados. Los cl\u00fasteres con admisi\u00f3n de PodSecurity o OPA/Gatekeeper bloquear\u00edan independientemente algunos de estos (como hostNetwork). Los cl\u00fasteres que dependen del modo Strict de Argo como capa de aplicaci\u00f3n principal est\u00e1n completamente expuestos. Este problema ha sido parcheado en las versiones 3.7.14 y 4.0.5."}], "id": "CVE-2026-42296", "lastModified": "2026-07-24T21:10:00.143", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.2, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.2, "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-42296", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-05-12T17:51:11.816105Z", "version": "2.0.3"}}]}, "published": "2026-05-09T04:16:25.563", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/argoproj/argo-workflows/commit/534f4ff1cbd86908e8ff76d97d553ad5a49a950d"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/argoproj/argo-workflows/releases/tag/v3.7.14"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/argoproj/argo-workflows/security/advisories/GHSA-3775-99mw-8rp4"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/security/cve/CVE-2026-42296"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2468446"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/argoproj/argo-workflows/security/advisories/GHSA-3775-99mw-8rp4"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42296.json"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-863"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-863"}], "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,3.7.14)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.0.0,4.0.5)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "argo-workflows", "source": "cna", "vendor": "argoproj"}, "product": "argo-workflows", "vendor": "argoproj"}], "created": "2026-05-09T05:30:15.793378+00:00", "updated": "2026-05-09T05:30:16.030192+00:00", "vendors": ["argoproj", "argoproj$PRODUCT$argo-workflows"]}