medium5.4
CVE-2026-45365
Open WebUI: Authenticated users can bypass model access control via exposed query parameter [AI-ASSISTED]
Impact
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.11, an internal-only bypass_filter parameter is exposed on the /openai/chat/completions and /ollama/api/chat HTTP endpoints via FastAPI query string binding, allowing any authenticated user to append ?bypass_filter=true and bypass model access control checks to invoke admin-restricted models. 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-v6qf-75pr-p96m
- https://github.com/open-webui/open-webui/security/advisories/GHSA-v6qf-75pr-p96m
- https://github.com/open-webui/open-webui/commit/c0385f60ba049da48d2d5452068586d375303c37
- https://github.com/open-webui/open-webui/releases/tag/v0.8.11
- https://nvd.nist.gov/vuln/detail/CVE-2026-45365