Information Disclosure Vulnerability in Open WebUI by Open WebUI Team
CVE-2026-28786

4.3MEDIUM

Key Information:

Vendor

Open-webui

Status
Open-webui
Vendor
CVE Published:
26 March 2026

What is CVE-2026-28786?

The Open WebUI platform, an offline artificial intelligence solution, contains a vulnerability that allows authenticated non-admin users to trigger a FileNotFoundError via an unsanitized filename field in the speech-to-text transcription endpoint. This flaw results in sensitive information leakage, as the error message reveals the server's absolute DATA_DIR path within the HTTP 400 response body. The issue was addressed in version 0.8.6, emphasizing the importance of upgrading to secure deployments against potential information disclosure risks.

Affected Version(s)

open-webui < 0.8.6

References

https://github.com/open-webui/open-webui/security/advisor...
x_refsource_CONFIRM

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.