CVE-2026-45386 MEDIUM

CVE-2026-45386: Open WebUI: An IDOR vulnerability exists in the pin_channel_message API endpoint

Vendor Open-Webui
Product open-webui
Weakness CWE-639 · IDOR
Published May 15, 2026
Last update May 19, 2026
View on NVD All CVEs

CVSS base score

4.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

What the vulnerability does

01Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, Pin/Unpin is a write operation (modifies the message's is_pinned , pinned_by, pinned_at fields), but in standard channels it only checks read permission, allowing users with read-only access to pin/unpin any message. This vulnerability is fixed in 0.9.5.

Key dates

02Disclosure timeline

May 15, 2026 CVE published
May 19, 2026 Record updated