{"id":"CVE-2026-63178","title":"Onyx is an open-source AI platform","summary":"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 u…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-639"],"published":"2026-08-17","updated":"2026-09-18","sourceUpdated":"2026-09-18T20:09:01.757","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-63178","references":[{"url":"https://github.com/onyx-dot-app/onyx/commit/46e19cc2750fed659488cb12a1f171016ba5a099","label":"security-advisories@github.com"},{"url":"https://github.com/onyx-dot-app/onyx/commit/b9e1c6894be3c237283f4b5fd4eb0af935b40664","label":"security-advisories@github.com"},{"url":"https://github.com/onyx-dot-app/onyx/pull/12525","label":"security-advisories@github.com"},{"url":"https://github.com/onyx-dot-app/onyx/pull/12549","label":"security-advisories@github.com"},{"url":"https://github.com/onyx-dot-app/onyx/releases/tag/v4.3.0","label":"security-advisories@github.com"},{"url":"https://github.com/onyx-dot-app/onyx/security/advisories/GHSA-7f48-vgpj-h95m","label":"security-advisories@github.com"},{"url":"https://github.com/onyx-dot-app/onyx/security/advisories/GHSA-7f48-vgpj-h95m","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00362,"epssPercentile":0.29897,"ingestedAt":"2026-09-18T20:51:25.625Z","slug":"CVE-2026-63178","body":"## Overview\n\nOnyx 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}