Missing Permission Check Vulnerability in Open WebUI by Open WebUI
CVE-2026-45301

8.1HIGH

Key Information:

Vendor

Open-webui

Status
Open-webui
Vendor
CVE Published:
15 May 2026

What is CVE-2026-45301?

A critical security concern has been identified in Open WebUI, where a missing permission check in all API-related files enables authenticated users to list, access, and delete files uploaded by other users on the platform. This flaw compromises user privacy and data integrity, as it allows unauthorized file management actions. The vulnerability has been addressed in version 0.3.16.

Affected Version(s)

open-webui < 0.3.16

References

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

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.