CVE-2026-59223

MEDIUM 4.3

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

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-693
Vendor	open-webui
Product	open-webui
Published	Jul 9, 2026
Last Updated	Jul 9, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

open-webui / open-webui

< 0.10.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/open-webui/open-webui/security/advisories/GHSA-qg3f-8x3j-ggf2 github.com: https://github.com/open-webui/open-webui/pull/25949 github.com: https://github.com/open-webui/open-webui/commit/087878ce848a4d828012068b5997dac480f43656 github.com: https://github.com/open-webui/open-webui/releases/tag/v0.10.0