{"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"}}]}}