medium4.3
CVE-2026-59223
Open WebUI: `WEB_FETCH_FILTER_LIST` host allow/block filter bypassable via URL path and non-label-boundary matching
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | open-webui | < 0.10.0 | 0.10.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Openwebui | Open Webui | before 0.10.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-qg3f-8x3j-ggf2
- https://github.com/open-webui/open-webui/security/advisories/GHSA-qg3f-8x3j-ggf2
- https://nvd.nist.gov/vuln/detail/CVE-2026-59223
- https://github.com/open-webui/open-webui/pull/25949
- https://github.com/open-webui/open-webui/commit/087878ce848a4d828012068b5997dac480f43656
- https://github.com/open-webui/open-webui/releases/tag/v0.10.0