{"id":"CVE-2026-59218","state":"PUBLISHED","title":"Open WebUI: Account enumeration via observable login timing discrepancy","description":"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.","publishedAt":"2026-07-09T15:53:54.653Z","updatedAt":"2026-07-09T17:50:41.900Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["open-webui open-webui"],"affected":[{"vendor":"open-webui","product":"open-webui","versions":[{"version":"< 0.10.0","status":"affected"}]}],"references":["https://github.com/open-webui/open-webui/security/advisories/GHSA-7rw5-9f7q-xj36","https://github.com/open-webui/open-webui/pull/26385","https://github.com/open-webui/open-webui/commit/993e74912199c66c522f08ec81abe31d76985e39","https://github.com/open-webui/open-webui/releases/tag/v0.10.0"],"weaknesses":["CWE-208"],"ingestedAt":"2026-10-29T20:12:32.778Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/59xxx/CVE-2026-59218.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-59218","state":"PUBLISHED","datePublished":"2026-07-09T15:53:54.653Z","dateUpdated":"2026-07-09T17:50:41.900Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-07-02T21:05:02.924Z"},"containers":{"cna":{"title":"Open WebUI: Account enumeration via observable login timing discrepancy","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"open-webui","product":"open-webui","versions":[{"version":"< 0.10.0","status":"affected"}]}],"references":[{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-7rw5-9f7q-xj36","name":"https://github.com/open-webui/open-webui/security/advisories/GHSA-7rw5-9f7q-xj36","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/open-webui/open-webui/pull/26385","name":"https://github.com/open-webui/open-webui/pull/26385","tags":["x_refsource_MISC"]},{"url":"https://github.com/open-webui/open-webui/commit/993e74912199c66c522f08ec81abe31d76985e39","name":"https://github.com/open-webui/open-webui/commit/993e74912199c66c522f08ec81abe31d76985e39","tags":["x_refsource_MISC"]},{"url":"https://github.com/open-webui/open-webui/releases/tag/v0.10.0","name":"https://github.com/open-webui/open-webui/releases/tag/v0.10.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-208","lang":"en","description":"CWE-208: Observable Timing Discrepancy","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-09T15:53:54.653Z"},"source":{"advisory":"GHSA-7rw5-9f7q-xj36","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-09T17:50:34.890081Z","id":"CVE-2026-59218","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-09T17:50:41.900Z"}}]}}}