{"cve":"CVE-2026-45349","nvd":{"published":"2026-05-15T20:16:48.823","modified":"2026-06-17T10:51:56.970","status":"Modified","description":"Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, a user just needs to use the API endpoint: /api/chat/completions with their own API key (generated in OWUI) and the Chat ID of another user to continue the conversation of the other user. This vulnerability is fixed in 0.9.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N","score":7.1},"cwes":["CWE-639"],"references":["https://github.com/open-webui/open-webui/security/advisories/GHSA-gfm2-xm6c-37qc","https://github.com/open-webui/open-webui/security/advisories/GHSA-gfm2-xm6c-37qc"],"products":["openwebui:open_webui"],"source":"nvd","synced_at":"2026-10-19T22:35:16.954578616+00:00"},"epss":{"cve":"CVE-2026-45349","score":0.00231,"percentile":0.14079,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-gfm2-xm6c-37qc","url":"https://osv.dev/vulnerability/GHSA-gfm2-xm6c-37qc","summary":"Open WebUI has Broken Access Control for Completions API","modified":"2026-07-13T16:42:30.280489709Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":["<0.9.0"],"fixed":["0.9.0"]}]},{"id":"PYSEC-2026-2726","url":"https://osv.dev/vulnerability/PYSEC-2026-2726","summary":"Open WebUI has Broken Access Control for Completions API","modified":"2026-07-13T16:32:19.896243740Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":["<0.9.0"],"fixed":["0.9.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}