CVE-2026-45345

Open WebUI: Missing authorization check at the model update function - models from other users can be updated

State: Published
Severity: 6.5 Medium
Published: May 15, 2026
Updated: May 18, 2026
Reserved: May 11, 2026

Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.5.7, a user can modify another user's model even if its visibility is set to Private. By changing the access permissions during editing, unauthorized access can be gained. This vulnerability is fixed in 0.5.7.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N	GitHub_M

Weaknesses

CWE-285 Improper Authorization

Affected Products

Product	Versions
open-webuiopen-webui	< 0.5.7Affected

References

https://github.com/open-webui/open-webui/security/advisories/GHSA-gm54-m39w-grjp

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