{"id":"CVE-2026-63178","state":"PUBLISHED","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","description":"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.","publishedAt":"2026-08-17T21:30:40.463Z","updatedAt":"2026-08-18T15:43:08.077Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["onyx-dot-app onyx"],"affected":[{"vendor":"onyx-dot-app","product":"onyx","versions":[{"version":"< 4.3.0","status":"affected"}]}],"references":["https://github.com/onyx-dot-app/onyx/security/advisories/GHSA-7f48-vgpj-h95m","https://github.com/onyx-dot-app/onyx/pull/12525","https://github.com/onyx-dot-app/onyx/pull/12549","https://github.com/onyx-dot-app/onyx/commit/46e19cc2750fed659488cb12a1f171016ba5a099","https://github.com/onyx-dot-app/onyx/commit/b9e1c6894be3c237283f4b5fd4eb0af935b40664","https://github.com/onyx-dot-app/onyx/releases/tag/v4.3.0"],"weaknesses":["CWE-639"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/63xxx/CVE-2026-63178.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63178","state":"PUBLISHED","datePublished":"2026-08-17T21:30:40.463Z","dateUpdated":"2026-08-18T15:43:08.077Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-07-15T22:13:00.720Z"},"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","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."}],"affected":[{"vendor":"onyx-dot-app","product":"onyx","versions":[{"version":"< 4.3.0","status":"affected"}]}],"references":[{"url":"https://github.com/onyx-dot-app/onyx/security/advisories/GHSA-7f48-vgpj-h95m","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/pull/12525","name":"https://github.com/onyx-dot-app/onyx/pull/12525","tags":["x_refsource_MISC"]},{"url":"https://github.com/onyx-dot-app/onyx/pull/12549","name":"https://github.com/onyx-dot-app/onyx/pull/12549","tags":["x_refsource_MISC"]},{"url":"https://github.com/onyx-dot-app/onyx/commit/46e19cc2750fed659488cb12a1f171016ba5a099","name":"https://github.com/onyx-dot-app/onyx/commit/46e19cc2750fed659488cb12a1f171016ba5a099","tags":["x_refsource_MISC"]},{"url":"https://github.com/onyx-dot-app/onyx/commit/b9e1c6894be3c237283f4b5fd4eb0af935b40664","name":"https://github.com/onyx-dot-app/onyx/commit/b9e1c6894be3c237283f4b5fd4eb0af935b40664","tags":["x_refsource_MISC"]},{"url":"https://github.com/onyx-dot-app/onyx/releases/tag/v4.3.0","name":"https://github.com/onyx-dot-app/onyx/releases/tag/v4.3.0","tags":["x_refsource_MISC"]}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"CWE-639: Authorization Bypass Through User-Controlled Key","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-17T21:30:40.463Z"},"source":{"advisory":"GHSA-7f48-vgpj-h95m","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","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"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-18T15:43:08.077Z"}}]}}}