CVE-2026-45351 — Open WebUI is a self-hosted artificial intelligence
CVE-2026-45351 — 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 syst
What This Means For You
- If your environment is affected by CWE-200, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-45351 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
2 rules · 6 SIEM formats2 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-45351 - Open WebUI Unauthorized Model Information Disclosure
title: CVE-2026-45351 - Open WebUI Unauthorized Model Information Disclosure
id: scw-2026-05-15-ai-1
status: experimental
level: medium
description: |
Detects the specific API endpoint '/api/models?' accessed via GET request, which is used by regular users in Open WebUI versions prior to 0.8.9 to inadvertently reveal system prompts of available models, indicating potential exploitation of CVE-2026-45351.
author: SCW Feed Engine (AI-generated)
date: 2026-05-15
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-45351/
tags:
- attack.defense_evasion
- attack.t1078.004
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '/api/models?':
cs-method:
- 'GET'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-45351 | vulnerability | CVE-2026-45351 |
| CWE-200 | weakness | CWE-200 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 16, 2026 at 01:16 UTC |
This content was curated and summarized by Shimi's Cyber World for informational purposes. It is not copied or republished in full. All intellectual property rights remain with the original author and source.
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