CVE-2026-87017

Open WebUI: Inaccessible knowledge bases are exposed through the built-in knowledge tool on most vector backends

State: Published
Severity: 4.3 Medium
Published: Sep 9, 2026
Updated: Sep 10, 2026
Reserved: Sep 8, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N	GitHub_M

Weaknesses

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-863 Incorrect Authorization

Affected Products

Product	Versions
open-webuiopen-webui	>= 0.7.0, < 0.11.1Affected

References

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