CVE-2026-28786
Open WebUI vulnerable to Path Traversal in `POST /api/v1/audio/transcriptions`
CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
5th
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.
| CWE | CWE-22 CWE-209 |
| Vendor | open-webui |
| Product | open-webui |
| Published | Mar 26, 2026 |
| Last Updated | Mar 27, 2026 |
Stay Ahead of the Next One
Get instant alerts for open-webui open-webui
Be the first to know when new medium vulnerabilities affecting open-webui open-webui are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
open-webui / open-webui
< 0.8.6