What is CVE-2026-54019?

CVE-2026-54019 is a medium-severity vulnerability in Open-Webui, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-06-23.

How severe is CVE-2026-54019?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Open-Webui

CVE-2026-54019

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.

Vulnerability class: Broken Access Control

EPSS: 0.004 (32.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Open-webui — versions < 0.9.6
Openwebui Open_webui

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-54019?: CVE-2026-54019 is a medium-severity vulnerability in Open-Webui, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-06-23.
How severe is CVE-2026-54019?: Medium severity. CVSS v3 base score is 6.5 out of 10.