Information Disclosure in Open WebUI Self-Hosted AI Platform
CVE-2026-44559

4.3MEDIUM

Key Information:

Vendor

Open-webui

Status
Open-webui
Vendor
CVE Published:
15 May 2026

What is CVE-2026-44559?

Open WebUI, an offline AI platform, had a flaw in its API endpoint that allowed authenticated users to list all members of private channels without verification. This security gap existed before version 0.9.0, enabling a user with knowledge of a channel's UUID to exploit the system and gain unauthorized access to sensitive user information.

Affected Version(s)

open-webui < 0.9.0

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

.