CVE-2026-31892

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From 2.9.0 to before 4.0.2 and 3.7.11, A user who can submit Workflows can completely bypass all security settings defined in a WorkflowTemplate by including a podSpecPatch field in their Workflow submission. This works even when the controller is configured with templateReferencing: Strict, which is specifically documented as a mechanism to restrict users to admin-approved templates. The podSpecPatch field on a submitted Workflow takes precedence over the referenced WorkflowTemplate during spec merging and is applied directly to the pod spec at creation time with no security validation. This vulnerability is fixed in 4.0.2 and 3.7.11."}, {"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. Desde la versi\u00f3n 2.9.0 hasta antes de la 4.0.2 y la 3.7.11, un usuario que puede enviar Workflows puede eludir completamente todas las configuraciones de seguridad definidas en un WorkflowTemplate al incluir un campo podSpecPatch en su env\u00edo de Workflow. Esto funciona incluso cuando el controlador est\u00e1 configurado con templateReferencing: Strict, que est\u00e1 espec\u00edficamente documentado como un mecanismo para restringir a los usuarios a plantillas aprobadas por el administrador. El campo podSpecPatch en un Workflow enviado tiene precedencia sobre el WorkflowTemplate referenciado durante la fusi\u00f3n de especificaciones y se aplica directamente a la especificaci\u00f3n del pod en el momento de la creaci\u00f3n sin validaci\u00f3n de seguridad. Esta vulnerabilidad est\u00e1 corregida en las versiones 4.0.2 y 3.7.11."}], "id": "CVE-2026-31892", "lastModified": "2026-07-15T02:19:51.447", "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": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.9, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 6.0, "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.9, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "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": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:H/E:X/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": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-31892", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-03-11T16:03:11.725974Z", "version": "2.0.3"}}]}, "published": "2026-03-11T16:16:44.033", "references": [{"source": "security-advisories@github.com", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/argoproj/argo-workflows/security/advisories/GHSA-3wf5-g532-rcrr"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:10184"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/security/cve/CVE-2026-31892"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2446551"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31892.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-807"}], "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}]}

{"bugzilla": {"description": "github.com/argoproj/argo-workflows: Argo Workflows: Security bypass allows privilege escalation via podSpecPatch field", "id": "2446551", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2446551"}, "csaw": false, "cvss3": {"cvss3_base_score": "9.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-807", "details": ["A flaw was found in Argo Workflows. A user with privileges to submit workflows can bypass security settings defined in a WorkflowTemplate by including a `podSpecPatch` field in their workflow submission. This allows them to circumvent restrictions, even when `templateReferencing: Strict` is configured, potentially leading to unauthorized resource access or privilege escalation."], "name": "CVE-2026-31892", "package_state": [{"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Affected", "package_name": "rhoai/odh-data-science-pipelines-argo-argoexec-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Affected", "package_name": "rhoai/odh-data-science-pipelines-argo-workflowcontroller-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Affected", "package_name": "rhoai/odh-ml-pipelines-api-server-v2-rhel8", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Affected", "package_name": "rhoai/odh-ml-pipelines-api-server-v2-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Affected", "package_name": "rhoai/odh-ml-pipelines-driver-rhel8", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Affected", "package_name": "rhoai/odh-ml-pipelines-driver-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Affected", "package_name": "rhoai/odh-ml-pipelines-launcher-rhel8", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Affected", "package_name": "rhoai/odh-ml-pipelines-launcher-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Affected", "package_name": "rhoai/odh-ml-pipelines-persistenceagent-v2-rhel8", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Affected", "package_name": "rhoai/odh-ml-pipelines-persistenceagent-v2-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Affected", "package_name": "rhoai/odh-ml-pipelines-scheduledworkflow-v2-rhel8", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Affected", "package_name": "rhoai/odh-ml-pipelines-scheduledworkflow-v2-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}], "public_date": "2026-03-11T15:41:14Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31892\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31892\nhttps://github.com/argoproj/argo-workflows/security/advisories/GHSA-3wf5-g532-rcrr"], "statement": "This IMPORTANT vulnerability affects Red Hat OpenShift AI through its use of Argo Workflows. A user with low privileges can bypass WorkflowTemplate security controls by submitting workflows with a `podSpecPatch` field that overrides template definitions. The scope is changed as attackers can manipulate pod specifications beyond their intended access, resulting in high impact to confidentiality, integrity, and availability. Affects versions 2.9.0 through 4.0.1 and 3.7.10.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.0.0,4.0.2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.9.0,3.7.11)"}}], "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"}], "analysis": {"en": {"generated_at": "2026-03-17T20:45:20.482060+00:00", "value": {"mitigation_remediation": ["Upgrade Argo Workflows to version 4.0.2 or later, or 3.7.11 or later, as applicable", "Restrict workflow submission rights to trusted administrators only until upgrade is complete", "Monitor workflow logs for unexpected podSpecPatch usage and investigate anomalies"], "summary": {"action": " Patch", "impact": "Privilege Escalation / Security Bypass"}, "threat_synthesis": {"affected_systems": "The affected vendor is argoproj:argo-workflows. Vulnerable releases include any version from 2.9.0 up to, but not including, 4.0.2, as well as any version up to, but not including, 3.7.11. The issue was fixed in release 4.0.2 and 3.7.11. Users should verify their installed version against these thresholds.", "description_and_impact": "Argo Workflows is an open source container-native workflow engine for Kubernetes. From versions 2.9.0 to before 4.0.2 and 3.7.11, a user who can submit Workflows can bypass all security settings defined in a WorkflowTemplate by including a podSpecPatch field in their Workflow submission. The podSpecPatch field takes precedence over the referenced WorkflowTemplate during spec merging and is applied directly to the pod spec at creation time with no security validation, even when the controller operates in Strict mode. This allows an attacker to run arbitrary containers or privileged actions, effectively escalating privileges and compromising cluster security. This weakness is related to CWE\u2011807 (Privilege Escalation) and CWE\u2011863 (Missing Authorization).", "risk_and_exploitability": "The CVSS score is 8.9, indicating high severity. EPSS score is below 1%, suggesting the likelihood of exploitation is currently low. The vulnerability is not listed in the CISA KEV catalog. Exploitation requires the ability to submit a Workflow; hence any user with workflow-creation permissions can launch the attack. Once the podSpecPatch is applied, the attacker can modify pod specifications to run malicious containers, potentially gaining elevated privileges within the cluster. This vulnerability is therefore considered a high-risk privilege escalation vector for systems that have exposed workflow submission capabilities."}}}}, "created": "2026-03-12T10:05:38.428831+00:00", "updated": "2026-03-23T09:55:26.549195+00:00", "vendors": ["argoproj", "argoproj$PRODUCT$argo-workflows"]}