CVE-2026-45301

HIGH

Open WebUI: Missing permission check in files API allows authenticated users to list, access and delete every uploaded file

Title source: cna
STIX 2.1

Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.3.16, a missing permission check in all files related API endpoints allows any authenticated user to list, access and delete every file uploaded by every user to the platform. This vulnerability is fixed in 0.3.16.

References (1)

Core 1
Core References

Scores

CVSS v3 8.1
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:H/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-284
Status published
Products (3)
open-webui/open-webui < 0.3.16
openwebui/open_webui < 0.3.16
pypi/open-webui 0 - 0.3.16PyPI
Published May 15, 2026
Tracked Since May 16, 2026