CVE-2026-45387 MEDIUM

CVE-2026-45387: Open WebUI: Sharing models for others to use (read permission) also exposes model details (system prompt leakage)

Vendor Open-Webui
Product open-webui
Weakness CWE-200 · Info exposure
Published May 15, 2026
Last update May 15, 2026
View on NVD All CVEs

CVSS base score

4.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

What the vulnerability does

01Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, when setting model permissions so that a group has read access to it, intending for other users to use it, those users also can read the model's system prompt. However users may consider their system prompt confidential, so this is considered a security issue. This vulnerability is fixed in 0.9.5.

Key dates

02Disclosure timeline

May 15, 2026 CVE published
May 15, 2026 Record updated

Related vulnerabilities

04Related CVE

CVE-2024-11292 WP Private Content Plus <= 3.6.1 - Unauthenticated Content Restriction Bypass to Sensitive Information Exposure CVE-2024-35682 WordPress Otter Blocks PRO plugin <= 2.6.11 - Authenticated Sensitive Data Exposure vulnerability CVE-2026-32099 Discourse prevents hidden profile data leak via user onebox CVE-2024-10357 Clever Addons for Elementor <= 2.2.1 - Authenticated (Contributor+) Sensitive Information Exposure via Elementor Templates CVE-2025-54425 Umbraco's Delivery API allows for cached requests to be returned with an invalid API key