{"id":"CVE-2026-59225","summary":"Open WebUI: Arena task endpoints can bypass underlying model access controls","details":"Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.12 before 0.10.0, an authenticated non-admin user with read access to an arena wrapper model can reach a restricted underlying model through task endpoints such as /api/v1/tasks/moa/completions. The normal chat route resolves arena models before the final chat dispatch and therefore re-checks the selected underlying model. The task routes call utils.chat.generate_chat_completion() directly. In that direct path, arena fallback resolution happens after the wrapper access check and then recurses with bypass_filter=True, skipping the selected submodel's access check. This issue is fixed in version 0.10.0.","aliases":["GHSA-m3qf-58wf-w979"],"modified":"2026-07-15T01:49:15.150727330Z","published":"2026-07-09T17:12:14.141Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-862"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59225.json"},"references":[{"type":"WEB","url":"https://github.com/open-webui/open-webui/releases/tag/v0.10.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59225.json"},{"type":"ADVISORY","url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-m3qf-58wf-w979"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59225"},{"type":"FIX","url":"https://github.com/open-webui/open-webui/commit/dc4924b66e655b315e3be4430a3e51b7d5c20acc"},{"type":"FIX","url":"https://github.com/open-webui/open-webui/pull/26046"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/open-webui/open-webui","events":[{"introduced":"9bd84258d09eefe7bf975878fb0e31a5dadfe0f8"},{"fixed":"4d2e13cf2bcc451b33bb6374bea4d2163e6cc94c"},{"fixed":"dc4924b66e655b315e3be4430a3e51b7d5c20acc"}],"database_specific":{"cpe":"cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0.8.12"},{"fixed":"0.10.0"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["v0.9.5","v0.9.4","v0.9.3","v0.9.2","v0.9.1","v0.9.0","v0.8.12"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59225.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L"}]}