Vulnerability in Open WebUI AI Platform Allows Unauthorized Message Updates
CVE-2026-44571

6.5MEDIUM

Key Information:

Vendor

Open-webui

Status
Open-webui
Vendor
CVE Published:
15 May 2026

What is CVE-2026-44571?

A vulnerability in Open WebUI allows users without proper authorization to modify messages in standard channels. Specifically, when the access control is set to None, the endpoint /api/v1/channels/{channel_id}/messages/{message_id}/update improperly validates permissions. This means that users who are not the original message owners can update messages, leading to potential information tampering. The issue has been resolved in version 0.8.6 where appropriate access control checks are implemented.

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:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.