CVE-2026-45345 — Open WebUI is a self-hosted artificial intelligence

title: CVE-2026-45345 - Open WebUI Private Model Modification Attempt
id: scw-2026-05-15-ai-1
status: experimental
level: high
description: |
  Detects attempts to modify a private model in Open WebUI by sending a PUT request to the '/api/models/' endpoint with 'visibility=private' in the query string. This targets the specific vulnerability in versions prior to 0.5.7 where users could modify private models by changing access permissions during editing, leading to unauthorized access.
author: SCW Feed Engine (AI-generated)
date: 2026-05-15
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-45345/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/api/models/'
      cs-method:
          - 'PUT'
      cs-uri-query|contains:
          - 'visibility=private'
  selection_base:
      sc-status:
          - 200
  condition: selection AND selection_base
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse