Vulnerability in Open-Webui
CVE-2026-59223
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 · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (30.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 30.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Open-Webui — versions < 0.10.0
- Openwebui Open Webui
Weakness classification (CWE)
References
- github.com/open-webui/open-webui/commit/087878ce848a4d828012068b5997dac480f43656 (Patch)
- github.com/open-webui/open-webui/pull/25949 (Patch, Issue Tracking)
- github.com/open-webui/open-webui/releases/tag/v0.10.0 (Product, Release Notes)
- github.com/open-webui/open-webui/security/advisories/GHSA-qg3f-8x3j-ggf2 (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-59223?
- CVE-2026-59223 is a medium-severity vulnerability in Open-Webui, classified under Protection Mechanism Failure. CVSS score: 4.3/10. Published 2026-07-09.
- How severe is CVE-2026-59223?
- Medium severity. CVSS v3 base score is 4.3 out of 10.