CVE-2026-45666

Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.11, the API /api/v1/notes/{note_id} endpoint lacks proper authorization checks, allowing authenticated users to retrieve notes belonging to other users by guessing or enumerating UUIDs. This results in unauthorized disclosure of potentially sensitive or private user data. This vulnerability is fixed in 0.8.11.

PUBLISHED Reserved 2026-05-12 | Published 2026-05-15 | Updated 2026-05-18 | Assigner GitHub_M

Problem types

CWE-639: Authorization Bypass Through User-Controlled Key

Product status

References

github.com/...-webui/security/advisories/GHSA-x3qm-p8hr-3c3h exploit

github.com/...-webui/security/advisories/GHSA-x3qm-p8hr-3c3h

cve.org (CVE-2026-45666)

nvd.nist.gov (CVE-2026-45666)

Download JSON