CVSS 3.1
4.3 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:NCVE-2026-28786
Medium (4.3) in openwebui open webui. EPSS 0.6% chance of exploitation in the next 30 days. Fixed in open-webui 0.8.6.
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.
Severity
- EPSS
- 0.6% chance of exploitation in the next 30 days; higher than 47% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-22, CWE-209
- Published
- Modified
- Record from
- the NVD, synced
Affected
- openwebui:open_webui
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-vvxm-vxmr-624h | PyPI | open-webui | <0.8.6 | 0.8.6 |
| PYSEC-2026-2764 | PyPI | open-webui | <0.8.6 | 0.8.6 |