CVE-2026-45666
MEDIUMOpen WebUI: Indirect Object Reference (IDOR) in user notes
Title source: cnaDescription
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.11, the API /api/v1/notes/{note_id} endpoint lacks proper authorization checks, allowing authenticated users to retrieve notes belonging to other users by guessing or enumerating UUIDs. This results in unauthorized disclosure of potentially sensitive or private user data. This vulnerability is fixed in 0.8.11.
References (1)
Core 1
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/open-webui/open-webui/security/advisories/GHSA-x3qm-p8hr-3c3h
Scores
CVSS v3
6.5
EPSS
0.0003
EPSS Percentile
10.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-639
Status
published
Products (3)
open-webui/open-webui
< 0.8.11
openwebui/open_webui
< 0.8.11
pypi/open-webui
0 - 0.8.11PyPI
Published
May 15, 2026
Tracked Since
May 16, 2026