Vulnerability in Open-Webui
CVE-2026-59218
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.10.0, the /api/v1/auths/signin endpoint looked users up by email and only ran bcrypt password verification when a credential existed, making registered-account attempts measurably slower than missing-email attempts and allowing unauthenticated account enumeration. This issue is fixed in version 0.10.0.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (33.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.5% 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/security/advisories/GHSA-7rw5-9f7q-xj36 (Vendor Advisory)
- github.com/open-webui/open-webui/pull/26385 (Patch, Issue Tracking)
- github.com/open-webui/open-webui/commit/993e74912199c66c522f08ec81abe31d76985e39 (Patch)
- github.com/open-webui/open-webui/releases/tag/v0.10.0 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-59218?
- CVE-2026-59218 is a medium-severity vulnerability in Open-Webui, classified under CWE-208. CVSS score: 5.3/10. Published 2026-07-09.
- How severe is CVE-2026-59218?
- Medium severity. CVSS v3 base score is 5.3 out of 10.