CVE-2026-54019 Open WebUI: RAG ACL Bypass in Milvus Multitenancy Mode

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...

CVE-2026-54019

Open WebUI CVE-2026-54019 describes an ACL bypass in Milvus multitenancy mode. Before version 0.9.6, collection-level ACL checks exist but can be bypassed when an attacker supplies user-controlled, unknown collection names, which Milvus treats as a resource_id and interpolates into an unsafe expr...