{"id":"CVE-2026-56400","aliases":["GHSA-6xcp-7mpr-m7wm"],"url":"https://o3.security/vulnerability/CVE-2026-56400","summary":"open-webui - Remote Code Execution via CORS Misconfiguration and Session Validation","details":"open-webui before 0.3.14 contains a cross-origin resource sharing misconfiguration allowing arbitrary origins with allow_origins=* and authenticated requests to the /api/v1/functions endpoint. Attackers can execute arbitrary code on the openwebui instance by crafting malicious cross-site requests from attacker-controlled websites when an admin user visits them.","published":"2026-07-15T11:25:31.421Z","modified":"2026-08-07T11:51:35.673838837Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"open-webui","fixedVersion":"0.3.33"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56400.json"},{"type":"ADVISORY","url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-6xcp-7mpr-m7wm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56400"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/open-webui-remote-code-execution-via-cors-misconfiguration-and-session-validation"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:51:35.673838837Z"}}