{"action":"Upgrade open-webui to 0.9.0 or later.","affected":[{"fixed":"0.9.0","introduced":"0"}],"component":"open-webui","cve_ids":["CVE-2026-45339"],"ecosystem":"PyPI","epss":0.00309,"exploited":false,"fixed_versions":["0.9.0"],"ghsa_id":"GHSA-57q6-fvp4-pqmm","id":"tcs_01M5KH5YDCQJAY6HAQ880V7F6V","modified_at":"2026-07-23T17:00:11.717513592Z","published_at":"2026-07-23T16:28:23.536357Z","references":["https://osv.dev/vulnerability/PYSEC-2026-3543","https://github.com/open-webui/open-webui/security/advisories/GHSA-57q6-fvp4-pqmm","https://nvd.nist.gov/vuln/detail/CVE-2026-45339","https://github.com/open-webui/open-webui","https://github.com/open-webui/open-webui/releases/tag/v0.9.0","https://pypi.org/project/open-webui","https://github.com/advisories/GHSA-57q6-fvp4-pqmm"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"PYSEC-2026-3543","url":"https://osv.dev/vulnerability/PYSEC-2026-3543"}],"summary":"Open WebUI's API key endpoint restrictions bypassed via `x-api-key` header — full message processing on restricted endpoints"}