CVE-2026-59218
Medium
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.
SeverityMedium
CVSS5.3
Exploit probability36. percentile0.4%
ProductOpenwebui Open Webui
PublishedJul 9, 2026
First seenJul 9, 2026
Weakness typeCWE-208CWE-208
How to fix
Update
- openwebui open_webui0.10.0 or later
- open-webui0.10.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openwebui open_webui | v < 0.10.0 | 0.10.0 |
| open-webuiPyPI | v < 0.10.0 | 0.10.0 |
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