| Component | Open WebUI |
| Severity | medium (CVSS 4.3) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| Published (NVD) | 2026-03-27 |
| Last modified | 2026-06-17 |
| Affected versions | open_webui < 0.8.6 |
| Fixed in | 0.8.6 |
| Weakness | CWE-22CWE-209 |
| CISA KEV | not listed |
NVD description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to version 0.8.6, an unsanitized filename field in the speech-to-text transcription endpoint allows any authenticated non-admin user to trigger a `FileNotFoundError` whose message — including the server's absolute `DATA_DIR` path — is returned verbatim in the HTTP 400 response body, confirming information disclosure on all default deployments. Version 0.8.6 patches the issue.
What to do
- Upgrade Open WebUI to
0.8.6or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
Read more
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