HIGHCVE-2026-45349Published Modified CNA GitHub_M
CVE-2026-45349: Open WebUI: Broken Access Control for Completions API
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, a user just needs to use the API endpoint: /api/chat/completions with their own API key (generated in OWUI) and the Chat ID of another user to continue the conversation of the other user. This vulnerability is fixed in 0.9.0.
Metrics
- CVSS v3.1
- 7.1
- Severity
- HIGH
- Fixed in
- —
- Affected Products
- 1
Affected packages
- open-webui / open-webui< 0.9.0
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N