CVE-2026-59223

MEDIUM4.3

Open WebUI: `WEB_FETCH_FILTER_LIST` host allow/block filter bypassable via URL path and non-label-boundary matching

Published Jul 9, 2026

Modified 1 months ago

Details

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.

References

WEB

https://github.com/open-webui/open-webui/commit/087878ce848a4d828012068b5997dac480f43656

WEB

https://github.com/open-webui/open-webui/pull/25949

WEB

https://github.com/open-webui/open-webui/releases/tag/v0.10.0

WEB

https://github.com/open-webui/open-webui/security/advisories/GHSA-qg3f-8x3j-ggf2

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-59223

CVSS Analysis