CVE-2026-54019

Medium

Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, Open WebUI added collection-level ACL checks, but the patch can still be bypassed when Milvus multitenancy mode is enabled. The ACL allows unknown non-KB collection names as legacy/ephemeral collections. In Milvus multitenancy mode, that user-controlled collection name becomes a resource_id and is interpolated into a Milvus expression without escaping. This is caused by an incomplete fix for CVE-2026-44560 This vulnerability is fixed in 0.9.6.

SeverityMedium

CVSS6.5

Exploit probability—

ProductOpenwebui Open Webui

PublishedJun 23, 2026

First seenJun 23, 2026

Weakness typeCWE-862Missing authorization CWE-943CWE-943

How to fix

Update

openwebui open_webui0.9.6 or later
open-webui0.9.6 or later

Affected products

Product	Affected versions	Fixed in
openwebui open_webui	v < 0.9.6	0.9.6
open-webuiPyPI	v < 0.9.6	0.9.6

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