CVE-2026-45365

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.

CVSS v3.1

5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS v3.1

5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

EPSS

0.19% chance of exploitation in the next 30 days, 9th percentile

Published

2026-05-15

Updated

2026-05-19

Proof-of-concept exploits (1)

• advisories/GHSA-v6qf-75pr-p96m

References

• CVE Record
• NVD entry

Related

• CVE-2026-4536
• CVE-2026-45369
• CVE-2026-45357
• CVE-2026-4537
• CVE-2026-45350
• CVE-2026-45371