medium6.5
CVE-2026-45666
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | open-webui | <= 0.8.10 | 0.8.11 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Openwebui | Open Webui | before 0.8.11 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-x3qm-p8hr-3c3h
- https://github.com/open-webui/open-webui/security/advisories/GHSA-x3qm-p8hr-3c3h
- https://github.com/open-webui/open-webui/commit/de3317e26bb67a2a7ea015a183bbd1d369880ebd
- https://github.com/open-webui/open-webui/releases/tag/v0.8.11
- https://nvd.nist.gov/vuln/detail/CVE-2026-45666