Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openwebui | Open Webui | < 0.10.0 |
Related Weaknesses (CWE)
References
- https://github.com/open-webui/open-webui/commit/087878ce848a4d828012068b5997dac4Patch
- https://github.com/open-webui/open-webui/pull/25949Issue TrackingPatch
- https://github.com/open-webui/open-webui/releases/tag/v0.10.0ProductRelease Notes
- https://github.com/open-webui/open-webui/security/advisories/GHSA-qg3f-8x3j-ggf2Vendor Advisory
FAQ
What is CVE-2026-59223?
CVE-2026-59223 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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...
How severe is CVE-2026-59223?
CVE-2026-59223 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-59223?
Check the references section above for vendor advisories and patch information. Affected products include: Openwebui Open Webui.