Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openwebui | Open Webui | < 0.10.0 |
Related Weaknesses (CWE)
References
- https://github.com/open-webui/open-webui/commit/993e74912199c66c522f08ec81abe31dPatch
- https://github.com/open-webui/open-webui/pull/26385Issue TrackingPatch
- https://github.com/open-webui/open-webui/releases/tag/v0.10.0ProductRelease Notes
- https://github.com/open-webui/open-webui/security/advisories/GHSA-7rw5-9f7q-xj36Vendor Advisory
FAQ
What is CVE-2026-59218?
CVE-2026-59218 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 verificat...
How severe is CVE-2026-59218?
CVE-2026-59218 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-59218?
Check the references section above for vendor advisories and patch information. Affected products include: Openwebui Open Webui.