CVE-2026-45351

MEDIUM

Open WebUI: Exposure of System Prompt to Regular User [Non-Admin]

Title source: cna
STIX 2.1

Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.9, when a regular user [non-admin] logs into the application, a http://IP:8080/api/models? web request is initiated by the application and in response, it reveals the system prompt of available models set by admin on models pages in workspace affecting the confidentiality of application. This vulnerability is fixed in 0.8.9.

References (1)

Core 1
Core References

Scores

CVSS v3 6.5
EPSS 0.0004
EPSS Percentile 11.5%
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-200
Status published
Products (3)
open-webui/open-webui < 0.8.9
openwebui/open_webui < 0.8.9
pypi/open-webui 0 - 0.8.9PyPI
Published May 15, 2026
Tracked Since May 16, 2026