CVE-2026-59223
Medium
Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.10.0, WEB_FETCH_FILTER_LIST matching compared configured host entries against URL strings and non-label-boundary suffixes, allowing path-based blocklist bypasses such as !internal.example.com in a URL path and sibling-domain matches that did not reflect the intended hostname policy. This issue is fixed in version 0.10.0.
SeverityMedium
CVSS4.3
Exploit probability—
ProductOpenwebui Open Webui
PublishedJul 9, 2026
First seenJul 9, 2026
Weakness typeCWE-693CWE-693
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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