{"id":"CVE-2026-59218","aliases":["GHSA-7rw5-9f7q-xj36","PYSEC-2026-3594"],"url":"https://o3.security/vulnerability/CVE-2026-59218","summary":"Open WebUI: Account enumeration via observable login timing discrepancy","details":"Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.10.0, the /api/v1/auths/signin endpoint looked users up by email and only ran bcrypt password verification when a credential existed, making registered-account attempts measurably slower than missing-email attempts and allowing unauthenticated account enumeration. This issue is fixed in version 0.10.0.","published":"2026-07-09T15:53:54.653Z","modified":"2026-08-12T03:51:43.494944206Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},"epss":{"score":0.00413,"percentile":0.34491,"asOf":"2026-09-06"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"open-webui","fixedVersion":"0.10.0"}],"fix":{"url":"https://github.com/open-webui/open-webui/commit/993e74912199c66c522f08ec81abe31d76985e39","label":"open-webui/open-webui@993e749"},"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-2026-59218.json"},{"type":"ADVISORY","url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-7rw5-9f7q-xj36"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59218"},{"type":"FIX","url":"https://github.com/open-webui/open-webui/commit/993e74912199c66c522f08ec81abe31d76985e39"},{"type":"FIX","url":"https://github.com/open-webui/open-webui/pull/26385"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:43.494944206Z"}}