Authorization Flaw in Open WebUI AI Platform
CVE-2026-45399

7.1HIGH

Key Information:

Vendor

Open-webui

Status
Open-webui
Vendor
CVE Published:
15 May 2026

What is CVE-2026-45399?

The Open WebUI platform, designed for offline AI operations, faced a serious authorization vulnerability where low-privileged authenticated users could manipulate system tasks. Specifically, they could enumerate active background tasks and terminate tasks belonging to other users, disrupting multi-user workflows and diminishing system integrity. This flaw was addressed in version 0.9.0 to enhance user permissions and protect task management features.

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:
7.1
Severity:
HIGH
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

.