{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-42183",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-04-25T01:53:21.582Z",
        "datePublished": "2026-05-09T03:44:10.712Z",
        "dateUpdated": "2026-05-13T17:46:04.800Z"
    },
    "containers": {
        "cna": {
            "title": "Argo Workflows: SSO RBAC Delegation Nil Pointer Dereference DoS (gatekeeper.go)",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-476",
                            "lang": "en",
                            "description": "CWE-476: NULL Pointer Dereference",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "LOW",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 2.3,
                        "baseSeverity": "LOW",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/argoproj/argo-workflows/security/advisories/GHSA-p4gq-3vxj-f4jq",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/argoproj/argo-workflows/security/advisories/GHSA-p4gq-3vxj-f4jq"
                },
                {
                    "name": "https://github.com/argoproj/argo-workflows/commit/c4cc17d0c034fa9a9cc01ef1af6c8016c93071d4",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/argoproj/argo-workflows/commit/c4cc17d0c034fa9a9cc01ef1af6c8016c93071d4"
                },
                {
                    "name": "https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5"
                }
            ],
            "affected": [
                {
                    "vendor": "argoproj",
                    "product": "argo-workflows",
                    "versions": [
                        {
                            "version": ">= 4.0.0, < 4.0.5",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-05-09T03:44:10.712Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. From version 4.0.0 to before version 4.0.5, a nil pointer dereference in server/auth/gatekeeper.go rbacAuthorization() causes a panic (denial of service) for SSO users whose claims match a namespace-level RBAC rule but not an SSO-namespace rule, when SSO_DELEGATE_RBAC_TO_NAMESPACE=true. This issue has been patched in version 4.0.5."
                }
            ],
            "source": {
                "advisory": "GHSA-p4gq-3vxj-f4jq",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-05-13T17:25:40.856061Z",
                                "id": "CVE-2026-42183",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-05-13T17:46:04.800Z"
                }
            }
        ]
    }
}