{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-45021",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-05-08T16:58:28.896Z",
        "datePublished": "2026-05-28T17:45:14.434Z",
        "dateUpdated": "2026-05-28T19:30:33.327Z"
    },
    "containers": {
        "cna": {
            "title": "Kuma: Default kuma-cp leaks admin token cross-origin via CORS wildcard + LocalhostIsAdmin",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-346",
                            "lang": "en",
                            "description": "CWE-346: Origin Validation Error",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-942",
                            "lang": "en",
                            "description": "CWE-942: Permissive Cross-domain Policy with Untrusted Domains",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "ACTIVE",
                        "vulnConfidentialityImpact": "LOW",
                        "vulnIntegrityImpact": "LOW",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 5.1,
                        "baseSeverity": "MEDIUM",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/kumahq/kuma/security/advisories/GHSA-3vcp-chfh-f6r2",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/kumahq/kuma/security/advisories/GHSA-3vcp-chfh-f6r2"
                },
                {
                    "name": "https://github.com/kumahq/kuma/pull/16416",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/kumahq/kuma/pull/16416"
                },
                {
                    "name": "https://github.com/kumahq/kuma/pull/16423",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/kumahq/kuma/pull/16423"
                },
                {
                    "name": "https://github.com/kumahq/kuma/pull/16424",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/kumahq/kuma/pull/16424"
                },
                {
                    "name": "https://github.com/kumahq/kuma/pull/16425",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/kumahq/kuma/pull/16425"
                },
                {
                    "name": "https://github.com/kumahq/kuma/pull/16426",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/kumahq/kuma/pull/16426"
                },
                {
                    "name": "https://github.com/kumahq/kuma/pull/16427",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/kumahq/kuma/pull/16427"
                },
                {
                    "name": "https://github.com/kumahq/kuma/commit/8fefa8595d44eb68d922405702ed7a0826322907",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/kumahq/kuma/commit/8fefa8595d44eb68d922405702ed7a0826322907"
                }
            ],
            "affected": [
                {
                    "vendor": "kumahq",
                    "product": "kuma",
                    "versions": [
                        {
                            "version": "< 2.7.25",
                            "status": "affected"
                        },
                        {
                            "version": ">= 2.9.0, < 2.9.15",
                            "status": "affected"
                        },
                        {
                            "version": ">= 2.11.0, < 2.11.13",
                            "status": "affected"
                        },
                        {
                            "version": ">= 2.12.0, < 2.12.10",
                            "status": "affected"
                        },
                        {
                            "version": ">= 2.13.0, < 2.13.5",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-05-28T17:45:14.434Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Kuma is a modern Envoy-based service mesh that can run on every cloud across both Kubernetes and VMs. Prior to 2.7.25, 2.9.15, 2.11.13, 2.12.10, and 2.13.5, the default kuma-cp config leaks the admin bootstrap token and signing keys to any webpage the operator visits while the control plane is reachable from their browser. CorsAllowedDomains: [\".*\"] reflects any Origin, and LocalhostIsAdmin: true promotes requests from 127.0.0.1 to mesh-system:admin. A cross-origin fetch() from a malicious page returns the admin JWT and signing material. This vulnerability is fixed in 2.7.25, 2.9.15, 2.11.13, 2.12.10, and 2.13.5."
                }
            ],
            "source": {
                "advisory": "GHSA-3vcp-chfh-f6r2",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-05-28T19:30:17.834875Z",
                                "id": "CVE-2026-45021",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "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": "2026-05-28T19:30:33.327Z"
                }
            }
        ]
    }
}