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OpenAdvisories
Medium · 6.5 CVE-2026-45351 EUVD-2026-30646GHSA-jh9g-8jqw-m2qxPYSEC-2026-2741

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

Published May 15, 2026 · Updated May 18, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
open-webui open-webui < 0.8.9 —

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI open-webui < 0.8.9 0.8.9 GHSA-jh9g-8jqw-m2qx

Advisories 1

References