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CVE-2026-59218Open WebUI: Account enumeration via observable login timing discrepancy
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.
5.3 MEDIUMEPSS 0.41%Not in KEVNVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 5.3 | MEDIUM | 3.1GitHub_M (CNA) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
Details
- CVE ID
- CVE-2026-59218
- Status
- Analyzed
- Assigner (CNA)
- GitHub_M
- Published
- Jul 9, 2026
- Last modified
- 2026-07-10 18:30 UTC
- Weaknesses
- CWE-208 · Observable Timing Discrepancy
Affected Products
As published by the CNA in the CVE record.
open-webuiopen-webui1 version range
- < 0.10.0
References
- github.com https://github.com/open-webui/open-webui/commit/993e74912199c66c522f08ec81abe31d76985e39
- github.com https://github.com/open-webui/open-webui/pull/26385
- github.com https://github.com/open-webui/open-webui/releases/tag/v0.10.0
- github.com https://github.com/open-webui/open-webui/security/advisories/GHSA-7rw5-9f7q-xj36