{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-63178",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-07-15T22:13:00.720Z",
        "datePublished": "2026-08-17T21:30:40.463Z",
        "dateUpdated": "2026-08-18T15:43:08.077Z"
    },
    "containers": {
        "cna": {
            "title": "Onyx Curator-scope IDOR: any curator can modify membership of arbitrary user groups via unscoped PATCH /manage/admin/user-group/{id} and /add-users leading to cross-group document disclosure",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-639",
                            "lang": "en",
                            "description": "CWE-639: Authorization Bypass Through User-Controlled Key",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 6.5,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "HIGH",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/onyx-dot-app/onyx/security/advisories/GHSA-7f48-vgpj-h95m",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/onyx-dot-app/onyx/security/advisories/GHSA-7f48-vgpj-h95m"
                },
                {
                    "name": "https://github.com/onyx-dot-app/onyx/pull/12525",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/onyx-dot-app/onyx/pull/12525"
                },
                {
                    "name": "https://github.com/onyx-dot-app/onyx/pull/12549",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/onyx-dot-app/onyx/pull/12549"
                },
                {
                    "name": "https://github.com/onyx-dot-app/onyx/commit/46e19cc2750fed659488cb12a1f171016ba5a099",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/onyx-dot-app/onyx/commit/46e19cc2750fed659488cb12a1f171016ba5a099"
                },
                {
                    "name": "https://github.com/onyx-dot-app/onyx/commit/b9e1c6894be3c237283f4b5fd4eb0af935b40664",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/onyx-dot-app/onyx/commit/b9e1c6894be3c237283f4b5fd4eb0af935b40664"
                },
                {
                    "name": "https://github.com/onyx-dot-app/onyx/releases/tag/v4.3.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/onyx-dot-app/onyx/releases/tag/v4.3.0"
                }
            ],
            "affected": [
                {
                    "vendor": "onyx-dot-app",
                    "product": "onyx",
                    "versions": [
                        {
                            "version": "< 4.3.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-17T21:30:40.463Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Onyx is an open-source AI platform. Prior to 4.3.0, Onyx Enterprise Edition's PATCH /manage/admin/user-group/{user_group_id} and POST /manage/admin/user-group/{user_group_id}/add-users endpoints in ee/onyx/server/user_group/api.py call update_user_group and add_users_to_user_group in ee/onyx/db/user_group.py without enforcing _validate_curator_can_modify_group, allowing a curator to add accounts to arbitrary groups and obtain document access through get_acl_for_user and the OpenSearch access_control_list filter. This issue is fixed in version 4.3.0."
                }
            ],
            "source": {
                "advisory": "GHSA-7f48-vgpj-h95m",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/onyx-dot-app/onyx/security/advisories/GHSA-7f48-vgpj-h95m",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-08-18T15:42:41.983120Z",
                                "id": "CVE-2026-63178",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-08-18T15:43:08.077Z"
                }
            }
        ]
    }
}