CVE-2026-87017: Openwebui Open Webui

Medium severity, CVSS 4.3. EPSS: 0.4% chance of exploitation in the next 30 days.

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.7.0 until 0.11.1, the built-in knowledge search tool passed the caller's readable knowledge identifiers through a metadata filter, but the search methods in eleven shipped vector backends ignored that filter. An authenticated user on an affected backend could enumerate the identifiers, names, and descriptions of inaccessible knowledge bases from the shared collection, although the associated document text remained in separate collections. This issue is fixed in version 0.11.1.

Affected products

• Openwebui Open Webui: from 0.7.0, before 0.11.1 (fixed in 0.11.1)

Published 2026-09-09. Last modified 2026-09-16.