CVE-2026-59223 | THREATINT

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.

PUBLISHED Reserved 2026-07-02 | Published 2026-07-09 | Updated 2026-07-09 | Assigner GitHub_M

MEDIUM: 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Problem types

CWE-693: Protection Mechanism Failure

Product status

< 0.10.0

affected

References

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

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

github.com/...ommit/087878ce848a4d828012068b5997dac480f43656

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

cve.org (CVE-2026-59223)

nvd.nist.gov (CVE-2026-59223)

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